diff --git a/internal/core/config_flow_test.go b/internal/core/config_flow_test.go
index b5c165f..548fc0b 100644
--- a/internal/core/config_flow_test.go
+++ b/internal/core/config_flow_test.go
@@ -3,6 +3,7 @@ package core
 import (
 	"net/http"
 	"net/url"
+	"strconv"
 	"strings"
 	"testing"
 )
@@ -44,64 +45,120 @@ func TestOrgConfigProfilesFlow(t *testing.T) {
 			t.Fatalf("create profile %s redirected to %q, want %q", p.name, got, want)
 		}
 	}
-	// A geofenced region, saved on the region page.
+	// A region, created in two steps the way the editor does it: the attribute form
+	// creates it as a draft, then the area page saves its drawn shape.
 	rsave := post(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions", url.Values{
 		"region_display":     {"Mountains"},
 		"region_token":       {"mtns"},
 		"region_layer":       {"2"},
 		"region_allow_flood": {"1"},
-		"root_allow_flood":   {"1"},
-		"region_geojson":     {`{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`},
 	}, sess)
 	rsave.Body.Close()
 	if rsave.StatusCode != http.StatusSeeOther {
-		t.Fatalf("save regions status = %d, want 303", rsave.StatusCode)
+		t.Fatalf("create region status = %d, want 303", rsave.StatusCode)
+	}
+	regions, err := st.ListRegions(ctx, org.ID)
+	if err != nil || len(regions) != 1 {
+		t.Fatalf("ListRegions = %v, %v; want one region", regions, err)
+	}
+	rid := strconv.FormatInt(regions[0].ID, 10)
+
+	// Before an area is drawn the region is a draft: flagged on the config page and
+	// contributing nothing to a location's region def.
+	draftView := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config?lat=15&lon=35", sess))
+	if !strings.Contains(draftView, `data-testid="config-region-draft"`) {
+		t.Fatal("a region with no area should be flagged as needing one")
+	}
+	if strings.Contains(draftView, "region def") {
+		t.Fatal("a draft region must not produce region def commands")
+	}
+
+	asave := post(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/"+rid+"/area", url.Values{
+		"region_geojson": {`{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`},
+	}, sess)
+	asave.Body.Close()
+	if asave.StatusCode != http.StatusSeeOther {
+		t.Fatalf("save area status = %d, want 303", asave.StatusCode)
 	}
 
 	body := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config", sess))
-	// The profile list, with per-row admin actions; the geofenced region surfaces as
-	// the click-to-preview location map (regions aren't listed individually).
+	// The profile list and the region list, each with per-row admin actions, plus the
+	// click-to-preview location map the drawn geofence enables.
 	for _, want := range []string{
 		"ESP32", "nRF52", `data-testid="config-profile-list"`,
 		`data-testid="config-profile-add"`, `data-testid="config-profile-edit"`, `data-testid="config-profile-delete"`,
-		`id="config-profile-modal"`, "Preview a location", "region-map",
+		`id="config-profile-modal"`, `data-testid="config-regions"`, "region-map",
+		"Mountains", "mtns", `data-testid="config-region-row"`, `data-testid="config-region-add"`,
+		`data-testid="config-region-area"`, `id="config-region-modal"`,
 	} {
 		if !strings.Contains(body, want) {
 			t.Fatalf("config view missing %q", want)
 		}
 	}
-	// Default selection shows the first profile's base settings.
-	if !strings.Contains(body, "ESP32 · base settings") {
-		t.Fatalf("default config view should show the first profile's base settings")
+	// With an area drawn, the region is no longer flagged as a draft.
+	if strings.Contains(body, `data-testid="config-region-draft"`) {
+		t.Fatal("a region with an area should not be flagged as needing one")
+	}
+	// And it now applies at a location inside it.
+	preview := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config?lat=15&lon=35", sess))
+	if !strings.Contains(preview, "region def mtns") {
+		t.Fatal("a drawn region should apply at a location inside it")
+	}
+	// Default selection shows the first profile's steps, not the second's.
+	if !strings.Contains(body, "esp base") || strings.Contains(body, "nrf base") {
+		t.Fatal("default config view should show the first profile's base settings")
 	}
 	// The profile selector works: ?profile= switches the shown base settings.
 	sel := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config?profile=nRF52", sess))
-	if !strings.Contains(sel, "nRF52 · base settings") {
-		t.Fatalf("?profile=nRF52 should show nRF52's base settings")
+	if !strings.Contains(sel, "nrf base") || strings.Contains(sel, "esp base") {
+		t.Fatal("?profile=nRF52 should show nRF52's base settings")
 	}
 
-	// The admin editor pages render: the hub summarizes the regions (profiles live
-	// on the config page now), the new-profile page shows the base-settings editor,
-	// and the region page has the map + a region row.
-	hub := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config/edit", sess))
-	for _, want := range []string{"Edit regions", "1 region"} {
-		if !strings.Contains(hub, want) {
-			t.Fatalf("config hub missing %q", want)
+	// The preview is assembled: with a location picked, the selected profile's steps
+	// and that location's region commands appear in one block, which is what a
+	// repeater owner actually runs.
+	assembled := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config?profile=ESP32&lat=15&lon=35", sess))
+	block := assembled[strings.Index(assembled, `data-testid="config-commands"`):]
+	block = block[:strings.Index(block, "</code>")]
+	for _, want := range []string{"esp base", "region def mtns", "region save"} {
+		if !strings.Contains(block, want) {
+			t.Fatalf("assembled preview missing %q; got %q", want, block)
 		}
 	}
-	if strings.Contains(hub, "Add profile") {
-		t.Fatalf("config hub should no longer manage profiles")
+	// Region-contributed lines are marked so the page can show where they came from.
+	if !strings.Contains(block, `data-testid="config-region-line"`) {
+		t.Fatal("region commands in the assembled preview should be marked as region lines")
 	}
+	// And the legend marks the regions that cover the picked location.
+	if !strings.Contains(assembled, `data-testid="config-region-match"`) {
+		t.Fatal("the legend should mark which regions apply at the previewed location")
+	}
+
+	// The standalone editor pages render (the no-JS fallbacks): the new-profile page
+	// shows the base-settings editor, and the region area page has the map.
 	newProf := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config/profiles/new", sess))
 	if !strings.Contains(newProf, "Base settings") || !strings.Contains(newProf, "Create profile") {
 		t.Fatalf("new-profile page missing its form")
 	}
-	rgn := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions", sess))
-	for _, want := range []string{"region-map", "Mountains", "mtns", "Add region", "everywhere", "Allow flood"} {
+	rgn := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/"+rid+"/area", sess))
+	for _, want := range []string{"region-map", "Mountains", "mtns", "Save area", "Clear area"} {
 		if !strings.Contains(rgn, want) {
-			t.Fatalf("regions editor missing %q", want)
+			t.Fatalf("region area editor missing %q", want)
 		}
 	}
+	// The old config hub is gone entirely (404), and the old bulk region editor's
+	// path is now POST-only — the collection you create a region through — so a GET
+	// there is a 405 rather than a page.
+	hub := do(t, ts, h.app, "/orgs/"+org.Slug+"/config/edit", sess)
+	hub.Body.Close()
+	if hub.StatusCode != http.StatusNotFound {
+		t.Errorf("GET /config/edit = %d, want 404 (route removed)", hub.StatusCode)
+	}
+	bulk := do(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions", sess)
+	bulk.Body.Close()
+	if bulk.StatusCode != http.StatusMethodNotAllowed {
+		t.Errorf("GET /config/regions = %d, want 405 (POST-only collection)", bulk.StatusCode)
+	}
 
 	// A non-admin member of a config-less org does NOT see the Configuration tab.
 	plain, _ := st.CreateUser(ctx, "plainmember", "")
diff --git a/internal/core/config_profile.go b/internal/core/config_profile.go
index 4c95bad..08e78bf 100644
--- a/internal/core/config_profile.go
+++ b/internal/core/config_profile.go
@@ -10,27 +10,10 @@ import (
 
 	"github.com/go-chi/chi/v5"
 
-	"github.com/jleight/meshtender/internal/geo"
 	"github.com/jleight/meshtender/internal/store"
 	"github.com/jleight/meshtender/internal/web"
 )
 
-// Bound on how many regions one save may define, so a malformed or abusive
-// submission can't insert unbounded rows. (Profiles are added one at a time.)
-const maxConfigRegions = 50
-
-// configRegionView is a region in the admin editor: its display name, MeshCore
-// token, layer (depth / region def order), and the raw GeoJSON geofence the map
-// editor reads and writes (empty = applies everywhere).
-type configRegionView struct {
-	DisplayName  string
-	Token        string
-	Layer        int
-	Primary      bool
-	AllowFlood   bool
-	GeofenceJSON string
-}
-
 // pageOrgConfig renders an org's configuration read-only: a selected profile's
 // base settings plus the regions (location steps). Visible to any signed-in user;
 // admins get an Edit button. ?profile= chooses which profile to show; ?lat=&lon=
@@ -76,39 +59,6 @@ func (s *Handlers) pageOrgConfig(w http.ResponseWriter, r *http.Request) {
 	s.Render(w, r, "org_config.html", data)
 }
 
-// pageConfigHub is the admin configuration overview: a summary of the org's
-// regions, which are edited on the map page. (Profiles are managed inline on the
-// Configuration page itself.)
-func (s *Handlers) pageConfigHub(w http.ResponseWriter, r *http.Request) {
-	orgID, ok := s.requireOrgAdmin(w, r)
-	if !ok {
-		return
-	}
-	org, err := s.Store.GetOrg(r.Context(), orgID)
-	if err != nil {
-		s.NotFound(w, r)
-		return
-	}
-	regions, err := s.Store.ListRegions(r.Context(), orgID)
-	if err != nil {
-		s.ServerError(w, r, "could not load config", err)
-		return
-	}
-	var primary string
-	for _, z := range regions {
-		if z.Primary {
-			primary = z.DisplayName
-			break
-		}
-	}
-	s.Render(w, r, "config_edit.html", map[string]any{
-		"Org":           org,
-		"Nav":           s.OrgNavFor(r.Context(), web.OrgNavArgs{OrgID: orgID, Name: org.Name, Slug: org.Slug, Active: "config", IsMember: true, IsAdmin: true, Manage: true}),
-		"RegionCount":   len(regions),
-		"PrimaryRegion": primary,
-	})
-}
-
 // pageProfileEdit renders the single-profile editor: blank for the /new route, or
 // pre-filled when a {pid} is present. 404s if the profile isn't this org's.
 func (s *Handlers) pageProfileEdit(w http.ResponseWriter, r *http.Request) {
@@ -150,7 +100,7 @@ func (s *Handlers) pageProfileEdit(w http.ResponseWriter, r *http.Request) {
 func (s *Handlers) renderProfileEdit(w http.ResponseWriter, r *http.Request, org *store.Org, pid int64, name, stepsText string, errs, risky []string) {
 	data := map[string]any{
 		"Org":       org,
-		"Nav":       s.OrgNavFor(r.Context(), web.OrgNavArgs{OrgID: org.ID, Name: org.Name, Slug: org.Slug, Active: "config", IsMember: true, IsAdmin: true, Manage: true}),
+		"Nav":       s.orgAdminNav(r, org),
 		"ProfileID": pid,
 		"Action":    profileFormAction(org.Slug, pid),
 		"Name":      name,
@@ -265,178 +215,6 @@ func (s *Handlers) handleDeleteProfile(w http.ResponseWriter, r *http.Request) {
 	http.Redirect(w, r, "/orgs/"+orgParam(r)+"/config", http.StatusSeeOther) //nolint:gosec // G710: local path or config-pinned origin
 }
 
-// pageRegionsEdit renders the region map editor (map + side list).
-func (s *Handlers) pageRegionsEdit(w http.ResponseWriter, r *http.Request) {
-	orgID, ok := s.requireOrgAdmin(w, r)
-	if !ok {
-		return
-	}
-	org, err := s.Store.GetOrg(r.Context(), orgID)
-	if err != nil {
-		s.NotFound(w, r)
-		return
-	}
-	regions, err := s.Store.ListRegions(r.Context(), orgID)
-	if err != nil {
-		s.ServerError(w, r, "could not load regions", err)
-		return
-	}
-	s.Render(w, r, "config_regions_edit.html", map[string]any{
-		"Org":            org,
-		"Nav":            s.OrgNavFor(r.Context(), web.OrgNavArgs{OrgID: orgID, Name: org.Name, Slug: org.Slug, Active: "config", IsMember: true, IsAdmin: true, Manage: true}),
-		"EmptyRegion":    configRegionView{AllowFlood: true},
-		"Regions":        regionViews(regions),
-		"RootAllowFlood": org.RootAllowFlood,
-	})
-}
-
-// handleSaveRegions validates and atomically replaces just the org's regions
-// (profiles are left untouched). On error the editor is re-rendered with input
-// preserved.
-func (s *Handlers) handleSaveRegions(w http.ResponseWriter, r *http.Request) {
-	orgID, ok := s.requireOrgAdmin(w, r)
-	if !ok {
-		return
-	}
-	if err := r.ParseForm(); err != nil {
-		http.Error(w, "bad form", http.StatusBadRequest)
-		return
-	}
-	rootAllowFlood := r.FormValue("root_allow_flood") == "1"
-	var errs []string
-	regions, regionVs := s.parseRegions(r, &errs)
-	if len(errs) > 0 {
-		org, gerr := s.Store.GetOrg(r.Context(), orgID)
-		if gerr != nil {
-			s.NotFound(w, r)
-			return
-		}
-		s.Render(w, r, "config_regions_edit.html", map[string]any{
-			"Org":            org,
-			"Nav":            s.OrgNavFor(r.Context(), web.OrgNavArgs{OrgID: orgID, Name: org.Name, Slug: org.Slug, Active: "config", IsMember: true, IsAdmin: true, Manage: true}),
-			"EmptyRegion":    configRegionView{AllowFlood: true},
-			"Errors":         errs,
-			"Regions":        regionVs,
-			"RootAllowFlood": rootAllowFlood,
-		})
-		return
-	}
-	if err := s.Store.ReplaceRegions(r.Context(), orgID, regions, rootAllowFlood); err != nil {
-		s.ServerError(w, r, "could not save", err)
-		return
-	}
-	http.Redirect(w, r, "/orgs/"+orgParam(r)+"/config", http.StatusSeeOther) //nolint:gosec // G710: local path or config-pinned origin
-}
-
-// parseRegions reads the repeated region blocks from the form into store inputs
-// and editor views. A region needs a token (its MeshCore name); the display name
-// defaults to the token when left blank. Tokens must be unique and use only
-// letters, digits, hyphens, or underscores (they are space-joined into a single
-// region def line, so spaces and the |/, separators are not allowed).
-func (s *Handlers) parseRegions(r *http.Request, errs *[]string) ([]store.RegionInput, []configRegionView) {
-	tokens := r.Form["region_token"]
-	if len(tokens) > maxConfigRegions {
-		*errs = append(*errs, fmt.Sprintf("Too many regions (max %d).", maxConfigRegions))
-	}
-	seen := map[string]bool{}
-	primaryTaken := false
-	var ins []store.RegionInput
-	var views []configRegionView
-	for i := range tokens {
-		token := strings.TrimSpace(formAt(r, "region_token", i))
-		display := strings.TrimSpace(formAt(r, "region_display", i))
-		geojson := strings.TrimSpace(formAt(r, "region_geojson", i))
-		layer, _ := strconv.Atoi(formAt(r, "region_layer", i))
-		primary := formAt(r, "region_primary", i) == "1"
-		allowFlood := formAt(r, "region_allow_flood", i) == "1"
-		if token == "" && display == "" && geojson == "" {
-			continue // empty block
-		}
-		zv := configRegionView{DisplayName: display, Token: token, Layer: layer, Primary: primary, AllowFlood: allowFlood, GeofenceJSON: geojson}
-		if token == "" {
-			*errs = append(*errs, "A region is missing its short name.")
-			views = append(views, zv)
-			continue
-		}
-		if !validRegionToken(token) {
-			*errs = append(*errs, fmt.Sprintf("Region name %q may only contain letters, digits, hyphens, or underscores.", token))
-			views = append(views, zv)
-			continue
-		}
-		if seen[strings.ToLower(token)] {
-			*errs = append(*errs, fmt.Sprintf("Duplicate region name %q.", token))
-			views = append(views, zv)
-			continue
-		}
-		seen[strings.ToLower(token)] = true
-		if display == "" {
-			display = token
-			zv.DisplayName = display
-		}
-		// Non-root regions must have a drawn area; the root region (*) is the only
-		// "applies everywhere" region and lives on the org, not in this list.
-		if geojson == "" {
-			*errs = append(*errs, fmt.Sprintf("Region %q needs a drawn area — outline it on the map, or rely on the root region.", token))
-			views = append(views, zv)
-			continue
-		}
-		geofence, ok := regionGeofence(zv, token, errs)
-		if !ok {
-			views = append(views, zv)
-			continue
-		}
-		// Only one region may be primary; keep the first and clear any later ones.
-		if primary && primaryTaken {
-			primary, zv.Primary = false, false
-		} else if primary {
-			primaryTaken = true
-		}
-		views = append(views, zv)
-		ins = append(ins, store.RegionInput{Token: token, DisplayName: display, Layer: layer, Primary: primary, AllowFlood: allowFlood, GeofenceJSON: geofence})
-	}
-	return ins, views
-}
-
-// validRegionToken reports whether s is a usable MeshCore region token: non-empty
-// and limited to letters, digits, hyphens, and underscores.
-func validRegionToken(s string) bool {
-	if s == "" {
-		return false
-	}
-	for _, c := range s {
-		switch {
-		case c >= 'a' && c <= 'z', c >= 'A' && c <= 'Z', c >= '0' && c <= '9', c == '-', c == '_':
-		default:
-			return false
-		}
-	}
-	return true
-}
-
-// formAt returns the i-th value of a repeated form field, or "".
-func formAt(r *http.Request, field string, i int) string {
-	v := r.Form[field]
-	if i < len(v) {
-		return v[i]
-	}
-	return ""
-}
-
-// regionGeofence validates the GeoJSON drawn for a region. An empty shape is a
-// region that applies everywhere (nil geofence); anything else must parse as a
-// GeoJSON Polygon/MultiPolygon.
-func regionGeofence(zv configRegionView, name string, errs *[]string) ([]byte, bool) {
-	gj := strings.TrimSpace(zv.GeofenceJSON)
-	if gj == "" {
-		return nil, true // everywhere
-	}
-	if _, err := geo.Parse([]byte(gj)); err != nil {
-		*errs = append(*errs, fmt.Sprintf("Region %q has an invalid map shape — redraw it on the map.", name))
-		return nil, false
-	}
-	return []byte(gj), true
-}
-
 // parseConfigSteps turns textarea lines into config steps, validating each command
 // against the catalog with the same resolver the console uses. Blank lines are
 // skipped; "# ..." lines become comment steps; unknown commands are recorded in
@@ -517,16 +295,3 @@ func stepsToText(steps []store.ConfigStep) string {
 	}
 	return b.String()
 }
-
-// regionViews converts stored regions into editor views, carrying each geofence's
-// raw GeoJSON through verbatim so the map editor round-trips arbitrary polygons.
-func regionViews(regions []store.Region) []configRegionView {
-	out := make([]configRegionView, 0, len(regions))
-	for _, z := range regions {
-		out = append(out, configRegionView{
-			DisplayName: z.DisplayName, Token: z.Token, Layer: z.Layer, Primary: z.Primary,
-			AllowFlood: z.AllowFlood, GeofenceJSON: string(z.GeofenceJSON),
-		})
-	}
-	return out
-}
diff --git a/internal/core/config_profile_test.go b/internal/core/config_profile_test.go
index 4662cb9..b5c0b18 100644
--- a/internal/core/config_profile_test.go
+++ b/internal/core/config_profile_test.go
@@ -4,7 +4,6 @@ import (
 	"strings"
 	"testing"
 
-	"github.com/jleight/meshtender/internal/geo"
 	"github.com/jleight/meshtender/internal/store"
 )
 
@@ -80,33 +79,3 @@ func TestParseConfigStepsRegionMarker(t *testing.T) {
 	}
 	_ = risky
 }
-
-func TestRegionGeofence(t *testing.T) {
-	t.Parallel()
-
-	// Empty shape → everywhere (nil geofence, ok).
-	if gf, ok := regionGeofence(configRegionView{}, "z", new([]string)); !ok || gf != nil {
-		t.Fatalf("empty shape: got (%v,%v), want (nil,true)", gf, ok)
-	}
-
-	// A drawn polygon → carried through verbatim, parseable, contains its center.
-	drawn := `{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`
-	var errs []string
-	gf, ok := regionGeofence(configRegionView{GeofenceJSON: drawn}, "z", &errs)
-	if !ok || gf == nil {
-		t.Fatalf("drawn polygon: got (%v,%v), want non-nil geofence ok", gf, ok)
-	}
-	shape, err := geo.Parse(gf)
-	if err != nil {
-		t.Fatalf("parse geofence: %v", err)
-	}
-	if !shape.Contains(15, 35) {
-		t.Fatalf("geofence should contain its center")
-	}
-
-	// Malformed GeoJSON → error.
-	errs = nil
-	if _, ok := regionGeofence(configRegionView{GeofenceJSON: "{not geojson"}, "z", &errs); ok || len(errs) == 0 {
-		t.Fatalf("invalid shape should be rejected with an error")
-	}
-}
diff --git a/internal/core/config_region.go b/internal/core/config_region.go
new file mode 100644
index 0000000..5ca8d64
--- /dev/null
+++ b/internal/core/config_region.go
@@ -0,0 +1,404 @@
+package core
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/go-chi/chi/v5"
+
+	"github.com/jleight/meshtender/internal/geo"
+	"github.com/jleight/meshtender/internal/store"
+	"github.com/jleight/meshtender/internal/web"
+)
+
+// Regions are edited one at a time, split by what each part needs from the screen:
+//
+//   - Attributes (name, token, level, primary, flood) are a small form, edited in a
+//     modal on the Configuration page — the same pattern as profiles.
+//   - The area is drawn on a map, which needs the width and the spatial context of
+//     the neighboring regions, so it gets its own workspace page.
+//
+// The two save through separate endpoints, so a rejected attribute edit can never
+// discard a drawn polygon (and vice versa).
+
+// configRegionView is a region in the admin editor: its display name, MeshCore
+// token, layer (depth / region def order), flags, and the raw GeoJSON geofence the
+// map editor reads and writes (empty = a draft that applies nowhere yet).
+type configRegionView struct {
+	ID           int64
+	DisplayName  string
+	Token        string
+	Layer        int
+	Primary      bool
+	AllowFlood   bool
+	GeofenceJSON string
+}
+
+// regionAreaSibling is one *other* region of the org, drawn as read-only context on
+// the area map so an admin can see how the shape they're editing sits against its
+// neighbors.
+type regionAreaSibling struct {
+	Name    string `json:"name"`
+	GeoJSON string `json:"geojson"`
+}
+
+// pageRegionEdit renders the region attribute editor: blank for the /new route, or
+// pre-filled when a {rid} is present. 404s if the region isn't this org's.
+func (s *Handlers) pageRegionEdit(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	org, err := s.Store.GetOrg(r.Context(), orgID)
+	if err != nil {
+		s.NotFound(w, r)
+		return
+	}
+	// A new region defaults to allowing flood, matching the column default.
+	zv := configRegionView{AllowFlood: true}
+	if raw := chi.URLParam(r, "rid"); raw != "" {
+		rid, err := strconv.ParseInt(raw, 10, 64)
+		if err != nil {
+			s.NotFound(w, r)
+			return
+		}
+		z, err := s.Store.GetRegion(r.Context(), orgID, rid)
+		if errors.Is(err, store.ErrNotFound) {
+			s.NotFound(w, r)
+			return
+		}
+		if err != nil {
+			s.ServerError(w, r, "could not load region", err)
+			return
+		}
+		zv = regionView(*z)
+	}
+	s.renderRegionEdit(w, r, org, zv, nil)
+}
+
+// renderRegionEdit renders the attribute editor (shared by the initial GET and the
+// error re-render). A zero ID means a new region. An htmx request gets the modal
+// fragment the Configuration page swaps in place; anything else (no JS, or a direct
+// link) gets the standalone page.
+func (s *Handlers) renderRegionEdit(w http.ResponseWriter, r *http.Request, org *store.Org, zv configRegionView, errs []string) {
+	data := map[string]any{
+		"Org":    org,
+		"Nav":    s.orgAdminNav(r, org),
+		"Region": zv,
+		"Action": regionFormAction(org.Slug, zv.ID),
+		"Errors": errs,
+	}
+	if r.Header.Get("HX-Request") != "" {
+		data["Layout"] = "config-region-modal"
+	}
+	s.Render(w, r, "config_region_edit.html", data)
+}
+
+// regionFormAction is where the attribute editor posts: the collection for a new
+// region, the region's own URL for an update.
+func regionFormAction(slug string, rid int64) string {
+	if rid == 0 {
+		return "/orgs/" + slug + "/config/regions"
+	}
+	return "/orgs/" + slug + "/config/regions/" + strconv.FormatInt(rid, 10)
+}
+
+// handleCreateRegion validates and inserts a new region.
+func (s *Handlers) handleCreateRegion(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	s.saveRegion(w, r, orgID, 0)
+}
+
+// handleUpdateRegion validates and updates an existing region's attributes.
+func (s *Handlers) handleUpdateRegion(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	rid, ok := s.regionID(r)
+	if !ok {
+		s.NotFound(w, r)
+		return
+	}
+	s.saveRegion(w, r, orgID, rid)
+}
+
+// saveRegion parses the attribute form and creates (rid 0) or updates a region. On
+// a validation error it re-renders the editor with the entered values preserved; a
+// duplicate token is reported the same way rather than as a server error.
+func (s *Handlers) saveRegion(w http.ResponseWriter, r *http.Request, orgID, rid int64) {
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "bad form", http.StatusBadRequest)
+		return
+	}
+	org, err := s.Store.GetOrg(r.Context(), orgID)
+	if err != nil {
+		s.NotFound(w, r)
+		return
+	}
+	layer, _ := strconv.Atoi(strings.TrimSpace(r.FormValue("region_layer")))
+	zv := configRegionView{
+		ID:          rid,
+		DisplayName: strings.TrimSpace(r.FormValue("region_display")),
+		Token:       strings.TrimSpace(r.FormValue("region_token")),
+		Layer:       layer,
+		Primary:     r.FormValue("region_primary") == "1",
+		AllowFlood:  r.FormValue("region_allow_flood") == "1",
+	}
+
+	var errs []string
+	switch {
+	case zv.Token == "":
+		errs = append(errs, "Give the region a short name — it's the name MeshCore uses.")
+	case !validRegionToken(zv.Token):
+		errs = append(errs, fmt.Sprintf("Region name %q may only contain letters, digits, hyphens, or underscores.", zv.Token))
+	}
+	// The display name is optional; fall back to the token so a row always has a
+	// label to show.
+	display := zv.DisplayName
+	if display == "" {
+		display = zv.Token
+	}
+
+	if len(errs) == 0 {
+		in := store.RegionInput{
+			Token: zv.Token, DisplayName: display, Layer: zv.Layer,
+			Primary: zv.Primary, AllowFlood: zv.AllowFlood,
+		}
+		// Only the area endpoint writes a geofence, so neither branch here can drop a
+		// shape that's already been drawn.
+		if rid == 0 {
+			_, err = s.Store.CreateRegion(r.Context(), orgID, in)
+		} else {
+			err = s.Store.UpdateRegion(r.Context(), orgID, rid, in)
+		}
+		switch {
+		case errors.Is(err, store.ErrDuplicate):
+			errs = append(errs, fmt.Sprintf("A region named %q already exists.", zv.Token))
+		case errors.Is(err, store.ErrNotFound):
+			s.NotFound(w, r)
+			return
+		case err != nil:
+			s.ServerError(w, r, "could not save region", err)
+			return
+		default:
+			// hxRedirect closes the modal and reloads the config page.
+			s.hxRedirect(w, r, "/orgs/"+orgParam(r)+"/config")
+			return
+		}
+	}
+	s.renderRegionEdit(w, r, org, zv, errs)
+}
+
+// handleDeleteRegion removes a region and returns to the config page.
+func (s *Handlers) handleDeleteRegion(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	rid, ok := s.regionID(r)
+	if !ok {
+		s.NotFound(w, r)
+		return
+	}
+	if err := s.Store.DeleteRegion(r.Context(), orgID, rid); err != nil && !errors.Is(err, store.ErrNotFound) {
+		s.ServerError(w, r, "could not delete region", err)
+		return
+	}
+	http.Redirect(w, r, "/orgs/"+orgParam(r)+"/config", http.StatusSeeOther) //nolint:gosec // G710: local path or config-pinned origin
+}
+
+// pageRegionArea renders the area workspace for one region: a full-width map with
+// this region's shape editable and its siblings drawn as read-only context.
+func (s *Handlers) pageRegionArea(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	org, err := s.Store.GetOrg(r.Context(), orgID)
+	if err != nil {
+		s.NotFound(w, r)
+		return
+	}
+	rid, ok := s.regionID(r)
+	if !ok {
+		s.NotFound(w, r)
+		return
+	}
+	regions, err := s.Store.ListRegions(r.Context(), orgID)
+	if err != nil {
+		s.ServerError(w, r, "could not load regions", err)
+		return
+	}
+	zv, siblings, found := splitRegionAndSiblings(regions, rid)
+	if !found {
+		s.NotFound(w, r)
+		return
+	}
+	s.renderRegionArea(w, r, org, zv, siblings, nil)
+}
+
+// renderRegionArea renders the area workspace (shared by the initial GET and the
+// error re-render, which keeps the submitted shape so a bad polygon isn't lost).
+func (s *Handlers) renderRegionArea(w http.ResponseWriter, r *http.Request, org *store.Org, zv configRegionView, siblings []regionAreaSibling, errs []string) {
+	s.Render(w, r, "config_region_area.html", map[string]any{
+		"Org":      org,
+		"Nav":      s.orgAdminNav(r, org),
+		"Region":   zv,
+		"Siblings": siblings,
+		"Errors":   errs,
+	})
+}
+
+// handleSaveRegionArea saves just this region's drawn area. An empty shape clears it
+// back to a draft (the "Clear area" path), which is allowed — a region with no area
+// simply applies nowhere until one is drawn.
+func (s *Handlers) handleSaveRegionArea(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	rid, ok := s.regionID(r)
+	if !ok {
+		s.NotFound(w, r)
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "bad form", http.StatusBadRequest)
+		return
+	}
+	gj := strings.TrimSpace(r.FormValue("region_geojson"))
+
+	var errs []string
+	geofence, valid := regionGeofence(gj, &errs)
+	if valid {
+		err := s.Store.UpdateRegionGeofence(r.Context(), orgID, rid, geofence)
+		switch {
+		case errors.Is(err, store.ErrNotFound):
+			s.NotFound(w, r)
+			return
+		case err != nil:
+			s.ServerError(w, r, "could not save area", err)
+			return
+		}
+		http.Redirect(w, r, "/orgs/"+orgParam(r)+"/config", http.StatusSeeOther) //nolint:gosec // G710: local path or config-pinned origin
+		return
+	}
+	// Re-render with the rejected shape still in hand so the admin can fix it.
+	org, err := s.Store.GetOrg(r.Context(), orgID)
+	if err != nil {
+		s.NotFound(w, r)
+		return
+	}
+	regions, err := s.Store.ListRegions(r.Context(), orgID)
+	if err != nil {
+		s.ServerError(w, r, "could not load regions", err)
+		return
+	}
+	zv, siblings, found := splitRegionAndSiblings(regions, rid)
+	if !found {
+		s.NotFound(w, r)
+		return
+	}
+	zv.GeofenceJSON = gj
+	s.renderRegionArea(w, r, org, zv, siblings, errs)
+}
+
+// handleSetRootFlood toggles the org's root (*) flood policy. The root isn't a
+// region row, so it saves on its own from the Configuration page.
+func (s *Handlers) handleSetRootFlood(w http.ResponseWriter, r *http.Request) {
+	orgID, ok := s.requireOrgAdmin(w, r)
+	if !ok {
+		return
+	}
+	if err := r.ParseForm(); err != nil {
+		http.Error(w, "bad form", http.StatusBadRequest)
+		return
+	}
+	if err := s.Store.SetRootAllowFlood(r.Context(), orgID, r.FormValue("root_allow_flood") == "1"); err != nil {
+		s.ServerError(w, r, "could not save flood policy", err)
+		return
+	}
+	http.Redirect(w, r, "/orgs/"+orgParam(r)+"/config", http.StatusSeeOther) //nolint:gosec // G710: local path or config-pinned origin
+}
+
+// regionID reads the {rid} URL param.
+func (s *Handlers) regionID(r *http.Request) (int64, bool) {
+	rid, err := strconv.ParseInt(chi.URLParam(r, "rid"), 10, 64)
+	return rid, err == nil
+}
+
+// orgAdminNav builds the org sub-navigation for the admin config screens, which are
+// all admin-only members-area pages on the Configuration tab.
+func (s *Handlers) orgAdminNav(r *http.Request, org *store.Org) map[string]any {
+	return s.OrgNavFor(r.Context(), web.OrgNavArgs{
+		OrgID: org.ID, Name: org.Name, Slug: org.Slug, Active: "config",
+		IsMember: true, IsAdmin: true, Manage: true,
+	})
+}
+
+// splitRegionAndSiblings picks the target region out of an org's regions and turns
+// the rest into read-only map context. Only siblings with a drawn shape are
+// included — a draft has nothing to render.
+func splitRegionAndSiblings(regions []store.Region, rid int64) (configRegionView, []regionAreaSibling, bool) {
+	var zv configRegionView
+	found := false
+	var siblings []regionAreaSibling
+	for _, z := range regions {
+		if z.ID == rid {
+			zv, found = regionView(z), true
+			continue
+		}
+		if len(z.GeofenceJSON) > 0 {
+			siblings = append(siblings, regionAreaSibling{Name: z.DisplayName, GeoJSON: string(z.GeofenceJSON)})
+		}
+	}
+	return zv, siblings, found
+}
+
+// regionView converts a stored region into an editor view, carrying its geofence's
+// raw GeoJSON through verbatim so the map editor round-trips arbitrary polygons.
+func regionView(z store.Region) configRegionView {
+	return configRegionView{
+		ID: z.ID, DisplayName: z.DisplayName, Token: z.Token, Layer: z.Layer,
+		Primary: z.Primary, AllowFlood: z.AllowFlood, GeofenceJSON: string(z.GeofenceJSON),
+	}
+}
+
+// validRegionToken reports whether s is a usable MeshCore region token: non-empty
+// and limited to letters, digits, hyphens, and underscores. Tokens are space-joined
+// into a single `region def` line, so spaces and the |/, separators aren't allowed.
+func validRegionToken(s string) bool {
+	if s == "" {
+		return false
+	}
+	for _, c := range s {
+		switch {
+		case c >= 'a' && c <= 'z', c >= 'A' && c <= 'Z', c >= '0' && c <= '9', c == '-', c == '_':
+		default:
+			return false
+		}
+	}
+	return true
+}
+
+// regionGeofence validates the GeoJSON drawn for a region. An empty shape is a
+// draft (nil geofence, applies nowhere); anything else must parse as a GeoJSON
+// Polygon/MultiPolygon.
+func regionGeofence(gj string, errs *[]string) ([]byte, bool) {
+	gj = strings.TrimSpace(gj)
+	if gj == "" {
+		return nil, true // draft — no area yet
+	}
+	if _, err := geo.Parse([]byte(gj)); err != nil {
+		*errs = append(*errs, "That map shape isn't valid — redraw the area and try again.")
+		return nil, false
+	}
+	return []byte(gj), true
+}
diff --git a/internal/core/config_region_modal_test.go b/internal/core/config_region_modal_test.go
new file mode 100644
index 0000000..ca81d14
--- /dev/null
+++ b/internal/core/config_region_modal_test.go
@@ -0,0 +1,364 @@
+package core
+
+import (
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/jleight/meshtender/internal/geo"
+	"github.com/jleight/meshtender/internal/store"
+)
+
+// TestConfigRegionEditorSurfaces: the region attribute editor serves the modal
+// fragment to htmx and the standalone page to everything else (the no-JS fallback),
+// a validation error re-renders the fragment in place with the entered values kept,
+// and a save sends the browser back to the config page.
+func TestConfigRegionEditorSurfaces(t *testing.T) {
+	t.Parallel()
+	st, ctx, ts, h := splitServer(t)
+	admin, sess := appLogin(t, ts, st, ctx, h.app, "rgnmodaladmin")
+	org, err := st.CreateOrg(ctx, "Region Modal Org", admin.ID) // creator becomes admin
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+
+	// htmx GET → just the modal fragment (no page chrome), posting to the collection.
+	frag := readBody(t, doHX(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/new", sess))
+	for _, want := range []string{"modal-header", "Add region", `hx-post="/orgs/` + org.Slug + `/config/regions"`} {
+		if !strings.Contains(frag, want) {
+			t.Fatalf("new-region fragment missing %q", want)
+		}
+	}
+	if strings.Contains(frag, "<html") {
+		t.Fatal("htmx request should get a bare fragment, not the full page")
+	}
+	// The area is drawn on its own page, so the attribute form must not carry it.
+	if strings.Contains(frag, "region_geojson") {
+		t.Fatal("the attribute modal must not carry the geofence field")
+	}
+
+	// Plain GET → the full page fallback, with no htmx attributes to hijack it.
+	page := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/new", sess))
+	if !strings.Contains(page, "<html") || !strings.Contains(page, "Create region") {
+		t.Fatal("non-htmx request should get the standalone editor page")
+	}
+	if strings.Contains(page, "hx-post") {
+		t.Fatal("the fallback page must not carry hx-post (its target doesn't exist there)")
+	}
+
+	// A validation error on an htmx submit keeps the modal: 200 with the fragment,
+	// the error, and the entered values — never a redirect that drops the work.
+	bad := postHX(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions",
+		url.Values{"region_display": {"Buffalo"}, "region_token": {"not a token"}}, sess)
+	badBody := readBody(t, bad)
+	if bad.StatusCode != http.StatusOK || bad.Header.Get("HX-Redirect") != "" {
+		t.Fatalf("invalid submit = %d (HX-Redirect %q), want 200 with no redirect", bad.StatusCode, bad.Header.Get("HX-Redirect"))
+	}
+	for _, want := range []string{"Nothing was saved", "letters, digits", `value="Buffalo"`, `value="not a token"`} {
+		if !strings.Contains(badBody, want) {
+			t.Fatalf("re-rendered fragment missing %q", want)
+		}
+	}
+
+	// A valid htmx submit closes the modal via HX-Redirect back to the config page.
+	ok := postHX(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions",
+		url.Values{"region_display": {"Buffalo"}, "region_token": {"buf"}, "region_layer": {"3"}, "region_allow_flood": {"1"}}, sess)
+	ok.Body.Close()
+	if got, want := ok.Header.Get("HX-Redirect"), "/orgs/"+org.Slug+"/config"; ok.StatusCode != http.StatusOK || got != want {
+		t.Fatalf("valid submit = %d HX-Redirect %q, want 200 → %q", ok.StatusCode, got, want)
+	}
+
+	regions, err := st.ListRegions(ctx, org.ID)
+	if err != nil || len(regions) != 1 {
+		t.Fatalf("ListRegions = %v, %v; want one region", regions, err)
+	}
+	z := regions[0]
+	if z.Token != "buf" || z.DisplayName != "Buffalo" || z.Layer != 3 || !z.AllowFlood {
+		t.Fatalf("saved region = %+v", z)
+	}
+	// Created without an area: a draft, which applies nowhere.
+	if z.Geofence != nil {
+		t.Fatalf("a region created from the modal should have no area yet: %+v", z)
+	}
+	rid := strconv.FormatInt(z.ID, 10)
+
+	// The edit fragment is pre-filled and posts to that region's own URL.
+	editFrag := readBody(t, doHX(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/"+rid+"/edit", sess))
+	for _, want := range []string{"Edit region", `value="Buffalo"`, `value="buf"`,
+		`hx-post="/orgs/` + org.Slug + `/config/regions/` + rid + `"`} {
+		if !strings.Contains(editFrag, want) {
+			t.Fatalf("edit fragment missing %q", want)
+		}
+	}
+
+	// A duplicate token is reported as a validation error, not a 500.
+	dup := postHX(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions",
+		url.Values{"region_token": {"buf"}}, sess)
+	dupBody := readBody(t, dup)
+	if dup.StatusCode != http.StatusOK || !strings.Contains(dupBody, "already exists") {
+		t.Fatalf("duplicate token = %d, body missing the friendly message: %q", dup.StatusCode, dupBody)
+	}
+
+	// Deleting from the list row (a plain POST) returns to the config page.
+	del := post(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions/"+rid+"/delete", url.Values{}, sess)
+	del.Body.Close()
+	if got, want := del.Header.Get("Location"), "/orgs/"+org.Slug+"/config"; del.StatusCode != http.StatusSeeOther || got != want {
+		t.Fatalf("delete = %d → %q, want 303 → %q", del.StatusCode, got, want)
+	}
+	if left, _ := st.ListRegions(ctx, org.ID); len(left) != 0 {
+		t.Fatalf("regions after delete = %+v, want none", left)
+	}
+}
+
+// TestConfigRegionAreaSaves: the area workspace edits only the geofence. Saving a
+// drawn shape promotes a draft; saving an empty one clears it back to a draft; the
+// region's attributes are untouched either way, and a malformed shape re-renders the
+// page with the shape still in hand rather than discarding it.
+func TestConfigRegionAreaSaves(t *testing.T) {
+	t.Parallel()
+	st, ctx, ts, h := splitServer(t)
+	admin, sess := appLogin(t, ts, st, ctx, h.app, "rgnareaadmin")
+	org, err := st.CreateOrg(ctx, "Region Area Org", admin.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	rid, err := st.CreateRegion(ctx, org.ID, store.RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, Primary: true, AllowFlood: true,
+	})
+	if err != nil {
+		t.Fatalf("create region: %v", err)
+	}
+	// A sibling with a shape, which the workspace draws as read-only context.
+	if _, err := st.CreateRegion(ctx, org.ID, store.RegionInput{
+		Token: "us", DisplayName: "United States", Layer: 1, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(20, -130, 50, -60),
+	}); err != nil {
+		t.Fatalf("create sibling: %v", err)
+	}
+	area := "/orgs/" + org.Slug + "/config/regions/" + strconv.FormatInt(rid, 10) + "/area"
+
+	// The page renders the map, the region's identity, and the sibling for context.
+	page := readBody(t, do(t, ts, h.app, area, sess))
+	for _, want := range []string{"region-map", "region_geojson", "Buffalo", "buf", "United States", "initRegionArea"} {
+		if !strings.Contains(page, want) {
+			t.Fatalf("area page missing %q", want)
+		}
+	}
+
+	// Saving a drawn shape promotes the draft, leaving its attributes alone.
+	drawn := `{"type":"Polygon","coordinates":[[[-80,40],[-75,40],[-75,45],[-80,45],[-80,40]]]}`
+	resp := post(t, ts, h.app, area, url.Values{"region_geojson": {drawn}}, sess)
+	resp.Body.Close()
+	if got, want := resp.Header.Get("Location"), "/orgs/"+org.Slug+"/config"; resp.StatusCode != http.StatusSeeOther || got != want {
+		t.Fatalf("save area = %d → %q, want 303 → %q", resp.StatusCode, got, want)
+	}
+	z, err := st.GetRegion(ctx, org.ID, rid)
+	if err != nil {
+		t.Fatalf("get region: %v", err)
+	}
+	if z.Geofence == nil || !z.Geofence.Contains(42, -78) {
+		t.Fatalf("area not saved: %+v", z)
+	}
+	if z.Token != "buf" || z.DisplayName != "Buffalo" || z.Layer != 3 || !z.Primary || !z.AllowFlood {
+		t.Fatalf("saving an area disturbed the region's attributes: %+v", z)
+	}
+
+	// A malformed shape is rejected, keeps the stored area, and re-renders with the
+	// submitted GeoJSON so it isn't silently lost.
+	badResp := post(t, ts, h.app, area, url.Values{"region_geojson": {"{not geojson"}}, sess)
+	badBody := readBody(t, badResp)
+	if badResp.StatusCode != http.StatusOK {
+		t.Fatalf("invalid area = %d, want 200 with the editor re-rendered", badResp.StatusCode)
+	}
+	if !strings.Contains(badBody, "isn&#39;t valid") && !strings.Contains(badBody, "isn't valid") {
+		t.Fatalf("invalid area should explain itself: %q", badBody)
+	}
+	if !strings.Contains(badBody, "not geojson") {
+		t.Fatal("the rejected shape should be preserved in the re-rendered form")
+	}
+	if z, _ = st.GetRegion(ctx, org.ID, rid); z.Geofence == nil {
+		t.Fatal("a rejected save must not clear the stored area")
+	}
+
+	// An empty shape is a deliberate "Clear area" — back to a draft.
+	clear := post(t, ts, h.app, area, url.Values{"region_geojson": {""}}, sess)
+	clear.Body.Close()
+	if clear.StatusCode != http.StatusSeeOther {
+		t.Fatalf("clear area = %d, want 303", clear.StatusCode)
+	}
+	if z, _ = st.GetRegion(ctx, org.ID, rid); z.Geofence != nil {
+		t.Fatalf("clearing the area should return the region to a draft: %+v", z)
+	}
+}
+
+// TestConfigRegionEditingIsAdminOnly: the region controls render only for an org
+// admin — never for a plain member, and never on the anonymous public surface, which
+// shares this template. The endpoints themselves 404 for non-admins.
+func TestConfigRegionEditingIsAdminOnly(t *testing.T) {
+	t.Parallel()
+	st, ctx, ts, h := splitServer(t)
+	admin, adminSess := appLogin(t, ts, st, ctx, h.app, "rgnroleadmin")
+	org, err := st.CreateOrg(ctx, "Region Role Org", admin.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	rid, err := st.CreateRegion(ctx, org.ID, store.RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(40, -80, 45, -75),
+	})
+	if err != nil {
+		t.Fatalf("create region: %v", err)
+	}
+	member, memberSess := appLogin(t, ts, st, ctx, h.app, "rgnrolemember")
+	if err := st.AddOrgMember(ctx, org.ID, member.ID, "member"); err != nil {
+		t.Fatalf("add member: %v", err)
+	}
+
+	adminView := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config", adminSess))
+	for _, want := range []string{`data-testid="config-region-add"`, `data-testid="config-region-edit"`,
+		`data-testid="config-region-delete"`, `data-testid="config-region-area"`,
+		`data-testid="config-region-root"`, `id="config-region-modal"`, "Buffalo"} {
+		if !strings.Contains(adminView, want) {
+			t.Fatalf("admin config view missing %q", want)
+		}
+	}
+
+	for _, v := range []struct {
+		name string
+		body string
+	}{
+		{"member", readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config", memberSess))},
+		{"anonymous", readBody(t, do(t, ts, h.root, "/orgs/"+org.Slug+"/config"))},
+	} {
+		// Regions are public information — a member or visitor needs to see which
+		// areas an org defines and where they apply. Only the controls are admin-only.
+		for _, want := range []string{`data-testid="config-regions"`, `data-testid="config-region-row"`,
+			"Buffalo", "buf", "region-map"} {
+			if !strings.Contains(v.body, want) {
+				t.Errorf("%s config view should still show the regions; missing %q", v.name, want)
+			}
+		}
+		for _, forbidden := range []string{"config-region-add", "config-region-edit", "config-region-delete",
+			"config-region-modal", "config-region-root", "/config/regions"} {
+			if strings.Contains(v.body, forbidden) {
+				t.Fatalf("%s config view leaked the admin control %q", v.name, forbidden)
+			}
+		}
+	}
+
+	// The endpoints are admin-gated, not just hidden: a member gets 404 everywhere.
+	ridStr := strconv.FormatInt(rid, 10)
+	for _, path := range []string{
+		"/orgs/" + org.Slug + "/config/regions/new",
+		"/orgs/" + org.Slug + "/config/regions/" + ridStr + "/edit",
+		"/orgs/" + org.Slug + "/config/regions/" + ridStr + "/area",
+	} {
+		resp := do(t, ts, h.app, path, memberSess)
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusNotFound {
+			t.Errorf("member GET %s = %d, want 404", path, resp.StatusCode)
+		}
+	}
+	for _, path := range []string{
+		"/orgs/" + org.Slug + "/config/regions",
+		"/orgs/" + org.Slug + "/config/regions/" + ridStr,
+		"/orgs/" + org.Slug + "/config/regions/" + ridStr + "/delete",
+		"/orgs/" + org.Slug + "/config/regions/" + ridStr + "/area",
+		"/orgs/" + org.Slug + "/config/root-flood",
+	} {
+		resp := post(t, ts, h.app, path, url.Values{"region_token": {"x"}}, memberSess)
+		resp.Body.Close()
+		if resp.StatusCode != http.StatusNotFound {
+			t.Errorf("member POST %s = %d, want 404", path, resp.StatusCode)
+		}
+	}
+	// And nothing a member submitted took effect.
+	if z, err := st.GetRegion(ctx, org.ID, rid); err != nil || z.Token != "buf" {
+		t.Fatalf("region changed under a non-admin: %+v (err %v)", z, err)
+	}
+}
+
+// TestConfigMapMarksPrimaryRegion: the config map's payload flags the primary
+// region, which is what it opens framed on. Without that flag the map falls back to
+// containing every region, so a nationwide parent would force a continental view of
+// an org that operates in one county.
+func TestConfigMapMarksPrimaryRegion(t *testing.T) {
+	t.Parallel()
+	st, ctx, ts, h := splitServer(t)
+	admin, sess := appLogin(t, ts, st, ctx, h.app, "cfgmapprimary")
+	org, err := st.CreateOrg(ctx, "Map Primary Org", admin.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	for _, z := range []store.RegionInput{
+		{Token: "us", DisplayName: "US", Layer: 1, AllowFlood: true, GeofenceJSON: geo.Rectangle(25, -125, 49, -67)},
+		{Token: "wny", DisplayName: "Western New York", Layer: 3, Primary: true, AllowFlood: true,
+			GeofenceJSON: geo.Rectangle(42, -79.8, 43.5, -77.5)},
+	} {
+		if _, err := st.CreateRegion(ctx, org.ID, z); err != nil {
+			t.Fatalf("create region %s: %v", z.Token, err)
+		}
+	}
+
+	body := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config", sess))
+	// Exactly one region in the map payload is flagged primary, and it's the one the
+	// org marked — not simply the first drawn.
+	if got := strings.Count(body, `"primary":true`); got != 1 {
+		t.Fatalf("map payload has %d primary regions, want exactly 1", got)
+	}
+	// Regions ship ordered by (layer, token), so Western New York (layer 3) is last:
+	// the flag must fall after its name and nowhere before it. Slicing on braces
+	// would cut inside the escaped GeoJSON, which is full of them.
+	at := strings.Index(body, `"name":"Western New York"`)
+	if at < 0 {
+		t.Fatal("the primary region is missing from the map payload")
+	}
+	if strings.Contains(body[:at], `"primary":true`) {
+		t.Fatal("a region before the primary one carries the primary flag")
+	}
+	if !strings.Contains(body[at:], `"primary":true`) {
+		t.Fatal("the primary flag is not on Western New York")
+	}
+	// Every drawn region still ships with a color, so the legend swatches match.
+	if got := strings.Count(body, `"color":"#`); got != 2 {
+		t.Fatalf("map payload carries %d colors, want one per drawn region (2)", got)
+	}
+}
+
+// TestConfigRootFloodToggle: the root (*) flood policy saves on its own from the
+// config page — it isn't a region row, so it must not require any region to exist.
+func TestConfigRootFloodToggle(t *testing.T) {
+	t.Parallel()
+	st, ctx, ts, h := splitServer(t)
+	admin, sess := appLogin(t, ts, st, ctx, h.app, "rootfloodadmin")
+	org, err := st.CreateOrg(ctx, "Root Flood Org", admin.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	path := "/orgs/" + org.Slug + "/config/root-flood"
+
+	// An unchecked switch submits nothing → deny.
+	resp := post(t, ts, h.app, path, url.Values{}, sess)
+	resp.Body.Close()
+	if got, want := resp.Header.Get("Location"), "/orgs/"+org.Slug+"/config"; resp.StatusCode != http.StatusSeeOther || got != want {
+		t.Fatalf("deny flood = %d → %q, want 303 → %q", resp.StatusCode, got, want)
+	}
+	if allow, err := st.RootAllowFlood(ctx, org.ID); err != nil || allow {
+		t.Fatalf("root flood after deny = %v (err %v), want false", allow, err)
+	}
+
+	// A checked switch submits "1" → allow.
+	resp = post(t, ts, h.app, path, url.Values{"root_allow_flood": {"1"}}, sess)
+	resp.Body.Close()
+	if allow, err := st.RootAllowFlood(ctx, org.ID); err != nil || !allow {
+		t.Fatalf("root flood after allow = %v (err %v), want true", allow, err)
+	}
+
+	// The switch renders checked, reflecting the stored value.
+	page := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+"/config", sess))
+	if !strings.Contains(page, `name="root_allow_flood" value="1"`) {
+		t.Fatal("config page should render the root flood switch")
+	}
+}
diff --git a/internal/core/config_region_test.go b/internal/core/config_region_test.go
new file mode 100644
index 0000000..ea05db0
--- /dev/null
+++ b/internal/core/config_region_test.go
@@ -0,0 +1,74 @@
+package core
+
+import (
+	"testing"
+
+	"github.com/jleight/meshtender/internal/geo"
+)
+
+func TestRegionGeofence(t *testing.T) {
+	t.Parallel()
+
+	// No shape → a draft (nil geofence, accepted). The region simply applies
+	// nowhere until an area is drawn.
+	if gf, ok := regionGeofence("", new([]string)); !ok || gf != nil {
+		t.Fatalf("empty shape: got (%v,%v), want (nil,true)", gf, ok)
+	}
+	// Whitespace-only is the same thing (a cleared hidden input).
+	if gf, ok := regionGeofence("   ", new([]string)); !ok || gf != nil {
+		t.Fatalf("blank shape: got (%v,%v), want (nil,true)", gf, ok)
+	}
+
+	// A drawn polygon → carried through verbatim, parseable, contains its center.
+	drawn := `{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`
+	var errs []string
+	gf, ok := regionGeofence(drawn, &errs)
+	if !ok || gf == nil {
+		t.Fatalf("drawn polygon: got (%v,%v), want non-nil geofence ok", gf, ok)
+	}
+	shape, err := geo.Parse(gf)
+	if err != nil {
+		t.Fatalf("parse geofence: %v", err)
+	}
+	if !shape.Contains(15, 35) {
+		t.Fatal("geofence should contain its center")
+	}
+
+	// Malformed GeoJSON → error.
+	errs = nil
+	if _, ok := regionGeofence("{not geojson", &errs); ok || len(errs) == 0 {
+		t.Fatal("invalid shape should be rejected with an error")
+	}
+
+	// A non-area geometry is rejected too — geofences are Polygon/MultiPolygon.
+	errs = nil
+	if _, ok := regionGeofence(`{"type":"Point","coordinates":[30,10]}`, &errs); ok || len(errs) == 0 {
+		t.Fatal("a Point should be rejected as a region area")
+	}
+}
+
+func TestValidRegionToken(t *testing.T) {
+	t.Parallel()
+	for _, tok := range []string{"buf", "us-ny", "us_ny", "L3", "0"} {
+		if !validRegionToken(tok) {
+			t.Errorf("validRegionToken(%q) = false, want true", tok)
+		}
+	}
+	// Tokens are space-joined into one `region def` line, so separators and spaces
+	// would corrupt the command.
+	for _, tok := range []string{"", "two words", "a|b", "a,b", "a/b", "né"} {
+		if validRegionToken(tok) {
+			t.Errorf("validRegionToken(%q) = true, want false", tok)
+		}
+	}
+}
+
+func TestRegionFormAction(t *testing.T) {
+	t.Parallel()
+	if got, want := regionFormAction("acme", 0), "/orgs/acme/config/regions"; got != want {
+		t.Errorf("new region action = %q, want %q", got, want)
+	}
+	if got, want := regionFormAction("acme", 7), "/orgs/acme/config/regions/7"; got != want {
+		t.Errorf("existing region action = %q, want %q", got, want)
+	}
+}
diff --git a/internal/core/console_config.go b/internal/core/console_config.go
index d9628b1..5050ab0 100644
--- a/internal/core/console_config.go
+++ b/internal/core/console_config.go
@@ -118,29 +118,24 @@ func (s *Handlers) consoleConfigJSON(w http.ResponseWriter, r *http.Request) {
 
 	// Profile base settings (verbatim; comment-only steps are notes, not commands),
 	// with the location-derived region commands spliced at the profile's
-	// {{ region }} marker or appended after all steps when it has none. The marker
-	// itself is dropped by SplitAtRegionMarker.
-	emitStep := func(step store.ConfigStep) {
-		c := consoleConfigCommand{Line: step.CommandLine, Comment: step.Comment}
-		if step.IsComment() {
-			c.Reason = "note"
-		} else {
-			c.Runnable, c.Reason = runnable(step.CommandLine)
+	// {{ region }} marker or appended after all steps when it has none.
+	//
+	// AssembledLines owns that ordering, shared with the org Configuration page, so
+	// what an owner previews there is exactly what the console offers to run.
+	for _, l := range cv.AssembledLines() {
+		if l.IsMarker {
+			continue // a placeholder for the page; never sent to a device
+		}
+		c := consoleConfigCommand{}
+		switch {
+		case l.IsComment:
+			c.Comment, c.Reason = l.Text, "note"
+		default:
+			c.Line = l.Text
+			c.Runnable, c.Reason = runnable(l.Text)
 		}
 		resp.Commands = append(resp.Commands, c)
 	}
-	before, after := store.SplitAtRegionMarker(cv.SelectedSteps)
-	for _, step := range before {
-		emitStep(step)
-	}
-	for _, line := range cv.RegionDef {
-		c := consoleConfigCommand{Line: line}
-		c.Runnable, c.Reason = runnable(line)
-		resp.Commands = append(resp.Commands, c)
-	}
-	for _, step := range after {
-		emitStep(step)
-	}
 
 	resp.Location = consoleConfigLocation{
 		Known:         lat != nil && lon != nil,
diff --git a/internal/core/endpoints_org_test.go b/internal/core/endpoints_org_test.go
index a5bbae4..7fe4094 100644
--- a/internal/core/endpoints_org_test.go
+++ b/internal/core/endpoints_org_test.go
@@ -7,6 +7,8 @@ import (
 	"strconv"
 	"strings"
 	"testing"
+
+	"github.com/jleight/meshtender/internal/store"
 )
 
 // Black-box coverage for the org-management POST endpoints (create/edit/links/
@@ -68,8 +70,10 @@ func TestOrgManagementPosts(t *testing.T) {
 	}
 }
 
-// #56 update config profile, #57 delete config profile. (Create #54 and regions
-// #59 are covered by TestOrgConfigProfilesFlow.)
+// #56 update config profile, #57 delete config profile, and the matching region
+// writes (#107 update, #108 delete, #110 area, #111 root flood). (Profile create #54
+// and region create #59 are covered by TestOrgConfigProfilesFlow; the modal/area
+// surfaces in config_region_modal_test.go.)
 func TestOrgConfigProfileUpdateDelete(t *testing.T) {
 	t.Parallel()
 	st, ctx, ts, h := splitServer(t)
@@ -97,6 +101,29 @@ func TestOrgConfigProfileUpdateDelete(t *testing.T) {
 	if loc, _ := url.Parse(del.Header.Get("Location")); del.StatusCode != http.StatusSeeOther || loc.Path != base {
 		t.Fatalf("delete profile = %d %q, want 303 → config", del.StatusCode, del.Header.Get("Location"))
 	}
+
+	// Regions mirror the same shape: every write lands back on the config page.
+	rid, err := st.CreateRegion(ctx, org.ID, store.RegionInput{Token: "buf", DisplayName: "Buffalo", AllowFlood: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	region := base + "/regions/" + strconv.FormatInt(rid, 10)
+	for _, step := range []struct {
+		name string
+		path string
+		form url.Values
+	}{
+		{"update region", region, url.Values{"region_token": {"buf"}, "region_display": {"Buffalo NY"}}},
+		{"save area", region + "/area", url.Values{"region_geojson": {`{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`}}},
+		{"root flood", base + "/root-flood", url.Values{"root_allow_flood": {"1"}}},
+		{"delete region", region + "/delete", url.Values{}},
+	} {
+		resp := post(t, ts, h.app, step.path, step.form, sess)
+		resp.Body.Close()
+		if loc, _ := url.Parse(resp.Header.Get("Location")); resp.StatusCode != http.StatusSeeOther || loc.Path != base {
+			t.Errorf("%s = %d %q, want 303 → config", step.name, resp.StatusCode, resp.Header.Get("Location"))
+		}
+	}
 }
 
 // #46 join, #47 leave — against an org owned by someone else.
@@ -251,7 +278,7 @@ func TestOrgEditModals(t *testing.T) {
 
 // TestOrgTabsHeaderConsistent: the shared org-header renders the Actions menu on
 // EVERY member tab (not just Home) — the fix for the menu vanishing when you switch
-// tabs. Admins also get "Edit configuration" in it.
+// tabs.
 func TestOrgTabsHeaderConsistent(t *testing.T) {
 	t.Parallel()
 	st, ctx, ts, h := splitServer(t)
@@ -262,10 +289,18 @@ func TestOrgTabsHeaderConsistent(t *testing.T) {
 	}
 	for _, tab := range []string{"", "/members", "/repeaters", "/config"} {
 		body := readBody(t, do(t, ts, h.app, "/orgs/"+org.Slug+tab, sess))
-		for _, want := range []string{">Actions<", "Leave organization", "View public page", "Edit configuration"} {
+		for _, want := range []string{">Actions<", "Leave organization", "View public page"} {
 			if !strings.Contains(body, want) {
 				t.Errorf("tab %q missing %q from the shared Actions header", tab, want)
 			}
 		}
+		// Configuration is reached by its own tab, which an admin always sees — even
+		// before the org has any config — so the Actions menu doesn't duplicate it.
+		if strings.Contains(body, "Edit configuration") {
+			t.Errorf("tab %q still offers Edit configuration in the Actions menu", tab)
+		}
+		if !strings.Contains(body, "/orgs/"+org.Slug+"/config") {
+			t.Errorf("tab %q does not link to the Configuration tab", tab)
+		}
 	}
 }
diff --git a/internal/core/repeater_setup_test.go b/internal/core/repeater_setup_test.go
index e53698c..d0de301 100644
--- a/internal/core/repeater_setup_test.go
+++ b/internal/core/repeater_setup_test.go
@@ -64,18 +64,17 @@ func TestSerialSetupFlow(t *testing.T) {
 	if save.StatusCode != http.StatusSeeOther {
 		t.Fatalf("profile save status = %d, want 303", save.StatusCode)
 	}
-	// Scoped-flooding pattern: allow flood inside the zone, deny at the root
-	// (root_allow_flood omitted = unchecked = deny).
-	rsave := post(t, ts, h.app, "/orgs/"+org.Slug+"/config/regions", url.Values{
-		"region_display":     {"Zone"},
-		"region_token":       {"zone"},
-		"region_layer":       {"1"},
-		"region_allow_flood": {"1"},
-		"region_geojson":     {`{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`},
-	}, sess)
-	rsave.Body.Close()
-	if rsave.StatusCode != http.StatusSeeOther {
-		t.Fatalf("region save status = %d, want 303", rsave.StatusCode)
+	// Scoped-flooding pattern: allow flood inside the zone, deny at the root. The
+	// region itself is fixture here — the region editor's own endpoints are covered
+	// in config_region_modal_test.go — so it's written straight to the store.
+	if _, err := st.CreateRegion(ctx, org.ID, store.RegionInput{
+		Token: "zone", DisplayName: "Zone", Layer: 1, AllowFlood: true,
+		GeofenceJSON: []byte(`{"type":"Polygon","coordinates":[[[30,10],[40,10],[40,20],[30,20],[30,10]]]}`),
+	}); err != nil {
+		t.Fatalf("create region: %v", err)
+	}
+	if err := st.SetRootAllowFlood(ctx, org.ID, false); err != nil {
+		t.Fatalf("deny root flood: %v", err)
 	}
 
 	// Build the command list for a point inside the region.
diff --git a/internal/core/templates/config_edit.html b/internal/core/templates/config_edit.html
deleted file mode 100644
index dcffd73..0000000
--- a/internal/core/templates/config_edit.html
+++ /dev/null
@@ -1,34 +0,0 @@
-{{define "title"}}Configuration · {{.Org.Name}} · MeshTender{{end}}
-{{define "header"}}
-<div class="row g-2 align-items-center">
-  <div class="col">
-    <div class="page-pretitle">{{.Org.Name}}</div>
-    <h1 class="page-title fs-1">Edit configuration</h1>
-  </div>
-  <div class="col-auto ms-auto d-print-none">
-    <a class="btn" href="/orgs/{{.Org.Slug}}/config">Back to configuration</a>
-  </div>
-</div>
-{{end}}
-{{define "content"}}
-{{template "org-tabs" .Nav}}
-
-<div class="card">
-  <div class="card-header">
-    <div>
-      <h2 class="card-title">Regions</h2>
-      <div class="text-secondary small">Named areas drawn on a map. A repeater is auto-assigned to every region whose area contains it, forming its <code>region def</code>.</div>
-    </div>
-    <div class="card-actions">
-      <a class="btn btn-primary" href="/orgs/{{.Org.Slug}}/config/regions">{{template "icon-map-pin" "me-1"}}Edit regions</a>
-    </div>
-  </div>
-  <div class="card-body">
-    {{if .RegionCount}}
-    <div class="text-secondary">{{.RegionCount}} region{{if ne .RegionCount 1}}s{{end}} defined{{if .PrimaryRegion}} · primary: <span class="text-body">{{.PrimaryRegion}}</span>{{end}}.</div>
-    {{else}}
-    <p class="text-secondary mb-0">No regions yet. Add regions to apply location-based settings automatically.</p>
-    {{end}}
-  </div>
-</div>
-{{end}}
diff --git a/internal/core/templates/config_region_area.html b/internal/core/templates/config_region_area.html
new file mode 100644
index 0000000..8fed620
--- /dev/null
+++ b/internal/core/templates/config_region_area.html
@@ -0,0 +1,96 @@
+{{/* The region area workspace: one region's geofence, drawn on a full-width map with
+     its siblings shown as read-only context. Attributes live in the modal on the
+     Configuration page — this page saves only the shape, through its own endpoint.
+
+     The side panel is deliberately roomy: it's where boundary import (load a real
+     administrative border and pick the areas you want) will land next to the draw
+     tools. */}}
+
+{{define "title"}}{{.Region.DisplayName}} area · {{.Org.Name}} · MeshTender{{end}}
+{{define "header"}}
+<div class="row g-2 align-items-center">
+  <div class="col">
+    <div class="page-pretitle">{{.Org.Name}} · Configuration · {{.Region.DisplayName}}</div>
+    <h1 class="page-title fs-1">Edit area</h1>
+  </div>
+  <div class="col-auto ms-auto d-print-none">
+    <a class="btn" href="/orgs/{{.Org.Slug}}/config">Back to configuration</a>
+  </div>
+</div>
+{{end}}
+{{define "content"}}
+{{template "org-tabs" .Nav}}
+
+{{if .Errors}}
+<div class="alert alert-danger" role="alert">
+  <div>
+    <div class="fw-bold">The area wasn't saved — fix this first:</div>
+    <ul class="mb-0">{{range .Errors}}<li>{{.}}</li>{{end}}</ul>
+  </div>
+</div>
+{{end}}
+
+<link rel="stylesheet" href="{{ asset "/static/leaflet.css" }}">
+<link rel="stylesheet" href="{{ asset "/static/leaflet-geoman.css" }}">
+
+<form method="post" action="/orgs/{{.Org.Slug}}/config/regions/{{.Region.ID}}/area" id="region-area-form">
+  <div class="row g-3">
+    <div class="col-lg-8">
+      <div id="region-map" style="height:600px; border-radius:var(--tblr-border-radius)"
+           role="region" aria-label="Map for drawing this region's boundary"></div>
+    </div>
+    <div class="col-lg-4">
+      <div class="card">
+        <div class="card-header">
+          <div>
+            <h2 class="card-title">{{.Region.DisplayName}}</h2>
+            <div class="text-secondary small">
+              <code>{{.Region.Token}}</code> · level {{.Region.Layer}}
+            </div>
+          </div>
+        </div>
+        <div class="card-body">
+          <div class="mb-3" data-testid="region-area-status">
+            <span class="text-secondary">Area:</span>
+            <span class="fw-bold" id="region-area-status">—</span>
+          </div>
+          <p class="text-secondary small">
+            Draw with the tools at the top-left of the map. A region needs an area
+            before it applies to anything — until then it's a draft and no repeater
+            picks it up.
+          </p>
+          {{if .Siblings}}
+          <p class="text-secondary small mb-0">
+            The org's other regions are outlined for reference. They can't be edited
+            here — open each one's own area editor.
+          </p>
+          {{end}}
+        </div>
+        <div class="card-footer">
+          <div class="btn-list">
+            <button type="submit" class="btn btn-primary" data-testid="save-area">Save area</button>
+            <a class="btn" href="/orgs/{{.Org.Slug}}/config">Cancel</a>
+            <button type="button" class="btn btn-ghost-danger ms-auto" id="region-area-clear">Clear area</button>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+  <input type="hidden" name="region_geojson" id="region_geojson" value="{{.Region.GeofenceJSON}}">
+</form>
+
+<script src="{{ asset "/static/leaflet.js" }}"></script>
+<script src="{{ asset "/static/leaflet-geoman.js" }}"></script>
+<script src="{{ asset "/static/regionmap.js" }}"></script>
+{{/* Values are interpolated in a JS context, so html/template JSON-encodes and
+     escapes them — the region names and shapes are user data. */}}
+<script nonce="{{.Nonce}}">
+  initRegionArea('region-map', {
+    input: 'region_geojson',
+    status: 'region-area-status',
+    clear: 'region-area-clear',
+    name: {{.Region.DisplayName}},
+    siblings: {{.Siblings}}
+  });
+</script>
+{{end}}
diff --git a/internal/core/templates/config_region_edit.html b/internal/core/templates/config_region_edit.html
new file mode 100644
index 0000000..da1d3b8
--- /dev/null
+++ b/internal/core/templates/config_region_edit.html
@@ -0,0 +1,106 @@
+{{/* The region attribute editor — everything about a region except its drawn area,
+     which is saved separately on the area workspace page so a rejected edit here
+     can never discard a polygon. Admins normally reach it as the config-region-modal
+     fragment swapped into #config-region-modal on the Configuration page; it posts
+     via htmx so a validation error re-renders the fragment in place (modal stays
+     open, entered values preserved) and a save sends HX-Redirect back to the config
+     page. The full page below is the no-JS / direct-link fallback, so it carries the
+     same form without the htmx attributes. */}}
+
+{{define "title"}}{{if .Region.ID}}Edit region{{else}}Add region{{end}} · {{.Org.Name}} · MeshTender{{end}}
+{{define "header"}}
+<div class="row g-2 align-items-center">
+  <div class="col">
+    <div class="page-pretitle">{{.Org.Name}} · Configuration</div>
+    <h1 class="page-title fs-1">{{if .Region.ID}}Edit region{{else}}Add region{{end}}</h1>
+  </div>
+  <div class="col-auto ms-auto d-print-none">
+    <a class="btn" href="/orgs/{{.Org.Slug}}/config">Back to configuration</a>
+  </div>
+</div>
+{{end}}
+{{define "content"}}
+{{template "org-tabs" .Nav}}
+
+{{template "region-editor-alerts" .}}
+
+<div class="card">
+  <div class="card-body">
+    <form method="post" action="{{.Action}}">
+      {{template "region-editor-fields" .}}
+      <div class="btn-list mt-3">
+        <button type="submit" class="btn btn-primary">{{if .Region.ID}}Save region{{else}}Create region{{end}}</button>
+        <a class="btn" href="/orgs/{{.Org.Slug}}/config">Cancel</a>
+      </div>
+    </form>
+  </div>
+</div>
+{{end}}
+
+{{/* config-region-modal is the htmx fragment swapped into #config-region-modal. */}}
+{{define "config-region-modal"}}
+<div class="modal-header">
+  <h2 class="modal-title">{{if .Region.ID}}Edit region{{else}}Add region{{end}}</h2>
+  <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+</div>
+<div class="modal-body">
+  {{template "region-editor-alerts" .}}
+  <form method="post" action="{{.Action}}" id="config-region-form"
+        hx-post="{{.Action}}" hx-target="#config-region-modal-content" hx-swap="innerHTML">
+    {{template "region-editor-fields" .}}
+  </form>
+</div>
+<div class="modal-footer">
+  <button type="button" class="btn btn-link link-secondary" data-bs-dismiss="modal">Cancel</button>
+  <button type="submit" form="config-region-form" class="btn btn-primary" data-testid="save-region">{{if .Region.ID}}Save region{{else}}Create region{{end}}</button>
+</div>
+{{end}}
+
+{{/* region-editor-alerts renders the validation errors, shared by page and modal. */}}
+{{define "region-editor-alerts"}}
+{{if .Errors}}
+<div class="alert alert-danger" role="alert">
+  <div>
+    <div class="fw-bold">Nothing was saved — fix these first:</div>
+    <ul class="mb-0">{{range .Errors}}<li>{{.}}</li>{{end}}</ul>
+  </div>
+</div>
+{{end}}
+{{end}}
+
+{{/* region-editor-fields are the form controls themselves — the <form> element
+     around them differs between the page and the modal. The area is deliberately
+     absent: it's drawn on the workspace page. */}}
+{{define "region-editor-fields"}}
+<div class="mb-3">
+  <label class="form-label" for="region_display">Display name</label>
+  <input class="form-control" id="region_display" name="region_display" value="{{.Region.DisplayName}}"
+         placeholder="Buffalo" maxlength="60" autofocus>
+  <small class="form-hint">The human label. Defaults to the short name if you leave it blank.</small>
+</div>
+<div class="row g-3">
+  <div class="col">
+    <label class="form-label" for="region_token">Short name</label>
+    <input class="form-control font-monospace" id="region_token" name="region_token" value="{{.Region.Token}}"
+           placeholder="buf" maxlength="30" spellcheck="false">
+    <small class="form-hint">Used by MeshCore in <code>region def</code>. Letters, digits, <code>-</code>, <code>_</code>.</small>
+  </div>
+  <div class="col-auto">
+    <label class="form-label" for="region_layer">Level</label>
+    <input class="form-control" type="number" id="region_layer" name="region_layer" value="{{.Region.Layer}}" style="width:6rem">
+    <small class="form-hint">Depth</small>
+  </div>
+</div>
+<div class="mt-3">
+  <label class="form-check form-switch">
+    <input class="form-check-input" type="checkbox" name="region_allow_flood" value="1" {{if .Region.AllowFlood}}checked{{end}}>
+    <span class="form-check-label">Allow flood</span>
+    <small class="form-hint">Whether flooding is permitted inside this region.</small>
+  </label>
+  <label class="form-check form-switch">
+    <input class="form-check-input" type="checkbox" name="region_primary" value="1" {{if .Region.Primary}}checked{{end}}>
+    <span class="form-check-label">Primary region</span>
+    <small class="form-hint">Frames the map on the Configuration page. Turning this on clears whichever region held it.</small>
+  </label>
+</div>
+{{end}}
diff --git a/internal/core/templates/config_regions_edit.html b/internal/core/templates/config_regions_edit.html
deleted file mode 100644
index 3efa8e7..0000000
--- a/internal/core/templates/config_regions_edit.html
+++ /dev/null
@@ -1,168 +0,0 @@
-{{define "title"}}Edit regions · {{.Org.Name}} · MeshTender{{end}}
-{{define "header"}}
-<div class="row g-2 align-items-center">
-  <div class="col">
-    <div class="page-pretitle">{{.Org.Name}} · Configuration</div>
-    <h1 class="page-title fs-1">Edit regions</h1>
-  </div>
-  <div class="col-auto ms-auto d-print-none">
-    <a class="btn" href="/orgs/{{.Org.Slug}}/config/edit">Back to configuration</a>
-  </div>
-</div>
-{{end}}
-{{define "content"}}
-{{template "org-tabs" .Nav}}
-
-{{if .Errors}}
-<div class="alert alert-danger">
-  <div>
-    <div class="fw-bold">Nothing was saved — fix these first:</div>
-    <ul class="mb-0">{{range .Errors}}<li>{{.}}</li>{{end}}</ul>
-  </div>
-</div>
-{{end}}
-
-<link rel="stylesheet" href="{{ asset "/static/leaflet.css" }}">
-<link rel="stylesheet" href="{{ asset "/static/leaflet-geoman.css" }}">
-<style>
-  @media (min-width: 992px) { .region-map-sticky { position: sticky; top: 1rem; } }
-</style>
-
-<p class="text-secondary">Each region has a <strong>display name</strong> (e.g. Buffalo), a short <strong>name</strong> used by MeshCore (e.g. <code>buf</code>), and a <strong>level</strong> for its depth (lower = broader, e.g. country 1 → state 2 → city 3). Pick a region in the list, then use the map tools to outline where it applies — every region needs an area (the root region at the top of the list is the one that applies everywhere).</p>
-
-<form method="post" action="/orgs/{{.Org.Slug}}/config/regions" id="regions-form">
-  <div class="row g-3">
-    <div class="col-lg-7">
-      <div class="region-map-sticky">
-        <div id="region-map" style="height:520px; border-radius:var(--tblr-border-radius)" role="region" aria-label="Map for drawing region boundaries"></div>
-        <p class="text-secondary small mt-2 mb-0">Draw with the tools at the top-left of the map. New shapes fill the selected region; drawing again adds a new region.</p>
-      </div>
-    </div>
-    <div class="col-lg-5">
-      {{/* The root region (*) is pinned first in the list. It is not a .region-block,
-           so the map editor ignores it; its only setting is flood policy. */}}
-      <div class="card card-sm mb-2">
-        <div class="card-body d-flex align-items-center gap-3">
-          <div class="flex-fill" style="min-width:0">
-            <div class="fw-bold">Root <span class="text-secondary fw-normal">· <code>*</code> · everywhere</span></div>
-            <div class="text-secondary small">Applies to every repeater. Deny flood to scope flooding to your defined regions.</div>
-          </div>
-          <label class="form-check form-switch m-0 flex-shrink-0 text-nowrap">
-            <input type="hidden" name="root_allow_flood" value="{{if .RootAllowFlood}}1{{end}}">
-            <input class="form-check-input" type="checkbox" {{if .RootAllowFlood}}checked{{end}} data-flood>
-            <span class="form-check-label">Allow flood</span>
-          </label>
-        </div>
-      </div>
-      <div id="regions">
-        {{range .Regions}}{{template "region-block" .}}{{end}}
-      </div>
-      <button type="button" class="btn btn-outline-primary w-100" id="add-region">{{template "icon-plus" "me-1"}}Add region</button>
-      <div class="btn-list mt-3">
-        <button type="submit" class="btn btn-primary">Save regions</button>
-        <a class="btn" href="/orgs/{{.Org.Slug}}/config">Cancel</a>
-      </div>
-    </div>
-  </div>
-</form>
-
-{{/* Hidden prototype cloned by addBlock(); kept out of the form via the template tag. */}}
-<template id="region-proto">{{template "region-block" .EmptyRegion}}</template>
-<script nonce="{{.Nonce}}">
-// addBlock stays global: regionmap.js calls it when a freshly drawn shape needs a
-// new region row (then it reconciles the map). The rest is delegated off the form
-// so cloned rows work without inline handlers (CSP-friendly).
-function addBlock(kind) {
-  const proto = document.getElementById(kind + '-proto');
-  document.getElementById(kind + 's').appendChild(proto.content.cloneNode(true));
-}
-(function () {
-  const form = document.getElementById('regions-form');
-  const rows = document.getElementById('regions');
-  if (!form || !rows) return;
-  const addBtn = document.getElementById('add-region');
-  if (addBtn) addBtn.addEventListener('click', function () { addBlock('region'); });
-
-  // The flood and primary switches each shadow a hidden input (submitted with the
-  // form). Flood is independent per region; primary is exclusive — turning one on
-  // clears the rest.
-  form.addEventListener('change', function (e) {
-    if (!e.target.matches) return;
-    if (e.target.matches('[data-flood]')) {
-      e.target.previousElementSibling.value = e.target.checked ? '1' : '';
-    } else if (e.target.matches('[data-primary]')) {
-      setPrimaryRegion(e.target);
-    }
-  });
-
-  form.addEventListener('click', function (e) {
-    if (!e.target.closest) return;
-    const removeBtn = e.target.closest('.region-remove-btn');
-    if (removeBtn) { const b = removeBtn.closest('.region-block'); if (b) b.remove(); }
-  });
-
-  // Only one region may be primary: reflect the toggled switch onto every block's
-  // switch + hidden input, clearing the others.
-  function setPrimaryRegion(cb) {
-    const block = cb.closest('.region-block');
-    const on = cb.checked;
-    rows.querySelectorAll('.region-block').forEach(function (b) {
-      const isThis = b === block && on;
-      const box = b.querySelector('[data-primary]');
-      const hidden = b.querySelector('input[name="region_primary"]');
-      if (box) box.checked = isThis;
-      if (hidden) hidden.value = isThis ? '1' : '';
-    });
-  }
-})();
-</script>
-<script src="{{ asset "/static/leaflet.js" }}"></script>
-<script src="{{ asset "/static/leaflet-geoman.js" }}"></script>
-<script src="{{ asset "/static/regionmap.js" }}"></script>
-<script nonce="{{.Nonce}}">initRegionEditor('region-map', 'regions');</script>
-{{end}}
-
-{{/* region-block is one node of the region hierarchy, shown as a card in the side
-     list. Its area is drawn on the map; region_geojson carries the GeoJSON the map
-     writes. regionmap.js keys off .region-block / region_geojson /
-     .region-clear / .region-active. */}}
-{{define "region-block"}}
-<div class="region-block card card-sm mb-2">
-  <div class="card-body">
-    <div class="row g-2 align-items-end">
-      <div class="col-12"><label class="form-label mb-1">Display name</label>
-        <input class="form-control" name="region_display" value="{{.DisplayName}}" placeholder="Buffalo"
-               aria-label="Region display name"></div>
-      <div class="col"><label class="form-label mb-1">Name</label>
-        <input class="form-control font-monospace" name="region_token" value="{{.Token}}" placeholder="buf"
-               aria-label="Region name (token used in commands)"></div>
-      <div class="col-auto"><label class="form-label mb-1">Level</label>
-        <input class="form-control" type="number" name="region_layer" value="{{.Layer}}" style="width:5rem"
-               aria-label="Region level"></div>
-    </div>
-    {{/* Settings/state: the region's own properties, shown as switches (matching
-         the root's flood switch) so each toggle reads clearly with its label,
-         distinct from the action buttons below. */}}
-    <div class="d-flex align-items-center flex-wrap gap-3 mt-2">
-      <label class="form-check form-switch m-0">
-        <input type="hidden" name="region_allow_flood" value="{{if .AllowFlood}}1{{end}}">
-        <input class="form-check-input" type="checkbox" {{if .AllowFlood}}checked{{end}} data-flood>
-        <span class="form-check-label">Allow flood</span>
-      </label>
-      <label class="form-check form-switch m-0">
-        {{/* Only one region may be primary; toggling one on clears the rest (see JS). */}}
-        <input type="hidden" name="region_primary" value="{{if .Primary}}1{{end}}">
-        <input class="form-check-input" type="checkbox" {{if .Primary}}checked{{end}} data-primary>
-        <span class="form-check-label">Primary</span>
-      </label>
-    </div>
-    {{/* Actions on the region's map area, plus Remove (danger) pushed to the end. */}}
-    <div class="d-flex align-items-center flex-wrap gap-2 mt-2 pt-2 border-top">
-      <button type="button" class="btn btn-sm region-edit-btn">Edit area</button>
-      <button type="button" class="btn btn-sm btn-ghost-secondary region-clear">Clear area</button>
-      <button type="button" class="btn btn-sm btn-ghost-danger ms-auto region-remove-btn">Remove</button>
-    </div>
-    <input type="hidden" name="region_geojson" value="{{.GeofenceJSON}}">
-  </div>
-</div>
-{{end}}
diff --git a/internal/core/web.go b/internal/core/web.go
index 171d49d..e1b03b3 100644
--- a/internal/core/web.go
+++ b/internal/core/web.go
@@ -246,14 +246,22 @@ func (s *Handlers) appRouter() chi.Router {
 			r.Post("/orgs/{id}/leave", s.handleLeaveOrg)
 			r.Post("/orgs/{id}/members/{userID}", s.handleSetOrgMember)
 			r.Get("/orgs/{id}/config", s.pageOrgConfig)
-			r.Get("/orgs/{id}/config/edit", s.pageConfigHub)
 			r.Get("/orgs/{id}/config/profiles/new", s.pageProfileEdit)
 			r.Post("/orgs/{id}/config/profiles", s.handleCreateProfile)
 			r.Get("/orgs/{id}/config/profiles/{pid}/edit", s.pageProfileEdit)
 			r.Post("/orgs/{id}/config/profiles/{pid}", s.handleUpdateProfile)
 			r.Post("/orgs/{id}/config/profiles/{pid}/delete", s.handleDeleteProfile)
-			r.Get("/orgs/{id}/config/regions", s.pageRegionsEdit)
-			r.Post("/orgs/{id}/config/regions", s.handleSaveRegions)
+			// Regions: attributes edit in a modal (mirroring profiles), the drawn area
+			// on its own workspace page. The root (*) flood policy isn't a region row,
+			// so it toggles on its own.
+			r.Get("/orgs/{id}/config/regions/new", s.pageRegionEdit)
+			r.Post("/orgs/{id}/config/regions", s.handleCreateRegion)
+			r.Get("/orgs/{id}/config/regions/{rid}/edit", s.pageRegionEdit)
+			r.Post("/orgs/{id}/config/regions/{rid}", s.handleUpdateRegion)
+			r.Post("/orgs/{id}/config/regions/{rid}/delete", s.handleDeleteRegion)
+			r.Get("/orgs/{id}/config/regions/{rid}/area", s.pageRegionArea)
+			r.Post("/orgs/{id}/config/regions/{rid}/area", s.handleSaveRegionArea)
+			r.Post("/orgs/{id}/config/root-flood", s.handleSetRootFlood)
 			// Custom org domains are hidden for now — the hosting/TLS infrastructure
 			// isn't in place yet. Leave the handlers in tree but don't expose them.
 			// r.Post("/orgs/{id}/domains", s.handleAddOrgDomain)
diff --git a/internal/e2e/config_profiles_test.go b/internal/e2e/config_profiles_test.go
index 7fe6d1f..b469ee7 100644
--- a/internal/e2e/config_profiles_test.go
+++ b/internal/e2e/config_profiles_test.go
@@ -43,9 +43,9 @@ func TestE2EConfigProfileSelect(t *testing.T) {
 		chromedp.WaitVisible(`[data-testid="config-profile-list"]`, chromedp.ByQuery),
 		// Click the second row's name to select it.
 		chromedp.Click(`[data-testid="config-profile-row"]:nth-of-type(2) a`, chromedp.ByQuery),
-		chromedp.WaitVisible(`.card-title`, chromedp.ByQuery),
-		chromedp.Text(`.col-lg-8 .card-title`, &heading, chromedp.ByQuery),
-		chromedp.Text(`.col-lg-8 .card-body pre`, &steps, chromedp.ByQuery),
+		chromedp.WaitVisible(`[data-testid="config-preview"]`, chromedp.ByQuery),
+		chromedp.Text(`[data-testid="config-preview"] .card-title`, &heading, chromedp.ByQuery),
+		chromedp.Text(`[data-testid="config-commands"]`, &steps, chromedp.ByQuery),
 		chromedp.Evaluate(`!!document.querySelector('[data-testid="config-profile-row"]:nth-of-type(2).active')`, &rowActive),
 	); err != nil {
 		t.Fatalf("browser run against %s: %v", cfgURL, err)
@@ -92,7 +92,7 @@ func TestE2EConfigProfileModalSave(t *testing.T) {
 		chromedp.Click(`[data-testid="save-profile"]`, chromedp.ByQuery),
 		// HX-Redirect navigates back to the config page, now showing the new profile.
 		chromedp.WaitVisible(`[data-testid="config-profile-list"]`, chromedp.ByQuery),
-		chromedp.Text(`.col-lg-8 .card-title`, &heading, chromedp.ByQuery),
+		chromedp.Text(`[data-testid="config-preview"] .card-title`, &heading, chromedp.ByQuery),
 		chromedp.Location(&currentURL),
 	); err != nil {
 		t.Fatalf("browser run against %s: %v", cfgURL, err)
diff --git a/internal/e2e/org_tabs_test.go b/internal/e2e/org_tabs_test.go
index bb1d4e1..970503b 100644
--- a/internal/e2e/org_tabs_test.go
+++ b/internal/e2e/org_tabs_test.go
@@ -17,8 +17,7 @@ import (
 func TestE2EOrgActionsConsistent(t *testing.T) {
 	srv := newE2EServer(t)
 	user, cookie := srv.login(t, "e2eorgtabs")
-	// CreateOrg makes the creator an admin member, so the Actions menu (with
-	// Edit configuration) renders.
+	// CreateOrg makes the creator an admin member, so the Actions menu renders.
 	org, err := srv.store.CreateOrg(srv.ctx, "Tabs Org", user.ID)
 	if err != nil {
 		t.Fatalf("create org: %v", err)
@@ -43,10 +42,14 @@ func TestE2EOrgActionsConsistent(t *testing.T) {
 	); err != nil {
 		t.Fatalf("browser run against %s: %v", membersURL, err)
 	}
-	for _, want := range []string{"Edit configuration", "View public page", "Leave organization"} {
+	for _, want := range []string{"View public page", "Leave organization"} {
 		if !strings.Contains(items, want) {
 			t.Errorf("Actions menu on the Members tab missing %q; got %q", want, items)
 		}
 	}
+	// Configuration has its own tab, so it isn't duplicated in this menu.
+	if strings.Contains(items, "Edit configuration") {
+		t.Errorf("Actions menu still offers Edit configuration; got %q", items)
+	}
 	watch.assertClean(t)
 }
diff --git a/internal/e2e/region_editor_test.go b/internal/e2e/region_editor_test.go
index 251ea06..46d4eb5 100644
--- a/internal/e2e/region_editor_test.go
+++ b/internal/e2e/region_editor_test.go
@@ -3,8 +3,12 @@
 package e2e
 
 import (
+	"strconv"
+	"strings"
 	"testing"
+	"time"
 
+	cdplog "github.com/chromedp/cdproto/log"
 	"github.com/chromedp/cdproto/network"
 	"github.com/chromedp/chromedp"
 
@@ -12,98 +16,430 @@ import (
 	"github.com/jleight/meshtender/internal/store"
 )
 
-// TestE2ERegionEditorControls renders the org region editor and checks the
-// clarified controls: Allow flood and Primary are labeled switches, the map-area
-// button reads "Edit area", and Primary is exclusive — turning one region's
-// Primary switch on clears the others. Runs under the strict CSP.
-func TestE2ERegionEditorControls(t *testing.T) {
+// TestE2ERegionModalSave: an admin adds a region from the Configuration page — the
+// attribute editor loads into the modal via htmx, saving navigates back, and the new
+// region is listed flagged as needing an area (it has no shape yet). Runs under the
+// strict CSP.
+func TestE2ERegionModalSave(t *testing.T) {
 	srv := newE2EServer(t)
-	owner, cookie := srv.login(t, "region-admin")
-	org, err := srv.store.CreateOrg(srv.ctx, "Region Org", owner.ID) // owner is an admin member
+	user, cookie := srv.login(t, "e2ergnadd")
+	org, err := srv.store.CreateOrg(srv.ctx, "Region Add Org", user.ID) // creator = admin
 	if err != nil {
 		t.Fatalf("create org: %v", err)
 	}
-	regions := []store.RegionInput{
-		{Token: "us", DisplayName: "US", Layer: 1, Primary: false,
-			GeofenceJSON: geo.Rectangle(30, -90, 48, -70)},
-		{Token: "us-ny", DisplayName: "New York", Layer: 2, Primary: true,
-			GeofenceJSON: geo.Rectangle(40, -80, 45, -73)},
-	}
-	if err := srv.store.ReplaceOrgConfig(srv.ctx, org.ID, nil, regions); err != nil {
-		t.Fatalf("replace config: %v", err)
-	}
 
 	bctx, cancel, watch := startBrowser(t)
 	defer cancel()
 
-	url := srv.appURL + "/orgs/" + org.Slug + "/config/regions"
-
-	// Read one region's control state by its token (row order isn't guaranteed).
-	stateJS := func(token string) string {
-		return `(function () {
-			var blocks = document.querySelectorAll('.region-block');
-			for (var i = 0; i < blocks.length; i++) {
-				var t = blocks[i].querySelector('input[name="region_token"]');
-				if (t && t.value === ` + "`" + token + "`" + `) {
-					return {
-						floodIsSwitch: !!blocks[i].querySelector('.form-switch [data-flood]'),
-						primaryIsSwitch: !!blocks[i].querySelector('.form-switch [data-primary]'),
-						primaryChecked: blocks[i].querySelector('[data-primary]').checked,
-						primaryHidden: blocks[i].querySelector('input[name="region_primary"]').value,
-						editText: blocks[i].querySelector('.region-edit-btn').textContent.trim(),
-					};
-				}
-			}
-			return null;
-		})()`
-	}
-	type ctrl struct {
-		FloodIsSwitch   bool   `json:"floodIsSwitch"`
-		PrimaryIsSwitch bool   `json:"primaryIsSwitch"`
-		PrimaryChecked  bool   `json:"primaryChecked"`
-		PrimaryHidden   string `json:"primaryHidden"`
-		EditText        string `json:"editText"`
-	}
-
-	var us0, ny0, us1, ny1 ctrl
+	var rowText string
+	var draftFlagged bool
+	cfgURL := srv.appURL + "/orgs/" + org.Slug + "/config"
 	if err := chromedp.Run(bctx,
 		network.Enable(),
+		cdplog.Enable(),
 		setSessionCookie(cookie),
-		chromedp.Navigate(url),
-		chromedp.WaitVisible(`.region-block`, chromedp.ByQuery),
-		chromedp.Evaluate(stateJS("us"), &us0),
-		chromedp.Evaluate(stateJS("us-ny"), &ny0),
-		// Turn on US's Primary switch; NY (currently primary) must clear.
-		chromedp.Evaluate(`(function(){
-			var b = Array.prototype.slice.call(document.querySelectorAll('.region-block'))
-				.find(function(x){ return x.querySelector('input[name="region_token"]').value === 'us'; });
-			b.querySelector('[data-primary]').click();
-			return true;
-		})()`, nil),
-		chromedp.Evaluate(stateJS("us"), &us1),
-		chromedp.Evaluate(stateJS("us-ny"), &ny1),
+		chromedp.Navigate(cfgURL),
+		chromedp.WaitVisible(`[data-testid="config-region-add"]`, chromedp.ByQuery),
+		chromedp.Click(`[data-testid="config-region-add"]`, chromedp.ByQuery),
+		// The attribute editor arrives in the modal via htmx.
+		chromedp.WaitVisible(`#config-region-modal-content input[name=region_display]`, chromedp.ByQuery),
+		chromedp.SetValue(`#config-region-modal-content input[name=region_display]`, "Buffalo", chromedp.ByQuery),
+		chromedp.SetValue(`#config-region-modal-content input[name=region_token]`, "buf", chromedp.ByQuery),
+		chromedp.SetValue(`#config-region-modal-content input[name=region_layer]`, "3", chromedp.ByQuery),
+		chromedp.Click(`[data-testid="save-region"]`, chromedp.ByQuery),
+		// HX-Redirect navigates back to the config page, now listing the region.
+		chromedp.WaitVisible(`[data-testid="config-region-row"]`, chromedp.ByQuery),
+		chromedp.Text(`[data-testid="config-region-row"]`, &rowText, chromedp.ByQuery),
+		chromedp.Evaluate(`!!document.querySelector('[data-testid="config-region-draft"]')`, &draftFlagged),
 	); err != nil {
-		t.Fatalf("browser run against %s: %v", url, err)
+		t.Fatalf("browser run against %s: %v", cfgURL, err)
+	}
+	for _, want := range []string{"Buffalo", "buf"} {
+		if !strings.Contains(rowText, want) {
+			t.Errorf("region row = %q, want it to mention %q", rowText, want)
+		}
+	}
+	if !draftFlagged {
+		t.Error("a region created without an area should be flagged as needing one")
 	}
 
-	// Controls are switches, and the map-area button is relabeled.
-	if !us0.FloodIsSwitch || !us0.PrimaryIsSwitch {
-		t.Errorf("US controls not switches: %+v", us0)
+	// It really is a draft in the database — no geofence, so it applies nowhere.
+	regions, err := srv.store.ListRegions(srv.ctx, org.ID)
+	if err != nil || len(regions) != 1 {
+		t.Fatalf("ListRegions = %v, %v; want one region", regions, err)
 	}
-	if us0.EditText != "Edit area" {
-		t.Errorf("edit button = %q, want %q", us0.EditText, "Edit area")
+	if regions[0].Geofence != nil {
+		t.Errorf("region should have no area yet: %+v", regions[0])
+	}
+	watch.assertClean(t)
+}
+
+// TestE2EConfigMapShowsRegionsAndPicksLocation: the Configuration page draws every
+// shaped region on its map, and clicking the map picks a location — after which the
+// regions covering that point are marked in the legend and their commands appear in
+// the assembled preview. This is the read path anonymous visitors and members use,
+// so it runs signed-out against the root host.
+func TestE2EConfigMapShowsRegionsAndPicksLocation(t *testing.T) {
+	srv := newE2EServer(t)
+	user, _ := srv.login(t, "e2ecfgmap")
+	org, err := srv.store.CreateOrg(srv.ctx, "Config Map Org", user.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	if _, err := srv.store.CreateProfile(srv.ctx, org.ID, "ESP32",
+		[]store.ConfigStep{{CommandLine: "set tx 22"}}); err != nil {
+		t.Fatalf("create profile: %v", err)
+	}
+	// Two nested regions plus one far away, so a pin inside the inner pair marks
+	// exactly two and leaves the third alone.
+	for _, z := range []store.RegionInput{
+		{Token: "us", DisplayName: "US", Layer: 1, AllowFlood: true, GeofenceJSON: geo.Rectangle(30, -90, 48, -70)},
+		{Token: "us-ny", DisplayName: "New York", Layer: 2, AllowFlood: true, GeofenceJSON: geo.Rectangle(40, -80, 45, -73)},
+		{Token: "far", DisplayName: "Far Away", Layer: 2, AllowFlood: true, GeofenceJSON: geo.Rectangle(0, 0, 5, 5)},
+	} {
+		if _, err := srv.store.CreateRegion(srv.ctx, org.ID, z); err != nil {
+			t.Fatalf("create region %s: %v", z.Token, err)
+		}
+	}
+
+	bctx, cancel, watch := startBrowser(t)
+	defer cancel()
+
+	// Signed out, on the public root host.
+	cfgURL := srv.rootURL + "/orgs/" + org.Slug + "/config"
+	var polygons, rows int
+	if err := chromedp.Run(bctx,
+		network.Enable(),
+		cdplog.Enable(),
+		chromedp.Navigate(cfgURL),
+		chromedp.WaitVisible(`#region-map .leaflet-overlay-pane path`, chromedp.ByQuery),
+		chromedp.Evaluate(`document.querySelectorAll('#region-map .leaflet-overlay-pane path').length`, &polygons),
+		chromedp.Evaluate(`document.querySelectorAll('[data-testid="config-region-row"]').length`, &rows),
+	); err != nil {
+		t.Fatalf("browser run against %s: %v", cfgURL, err)
+	}
+	if polygons != 3 {
+		t.Errorf("drew %d polygons, want 3 (one per shaped region)", polygons)
+	}
+	if rows != 3 {
+		t.Errorf("legend has %d rows, want 3", rows)
+	}
+
+	// Picking a location: the preview page marks the covering regions and assembles
+	// their commands with the profile's steps.
+	var matches int
+	var commands string
+	pinned := cfgURL + "?profile=ESP32&lat=42&lon=-78"
+	if err := chromedp.Run(bctx,
+		chromedp.Navigate(pinned),
+		chromedp.WaitVisible(`[data-testid="config-commands"]`, chromedp.ByQuery),
+		chromedp.Evaluate(`document.querySelectorAll('[data-testid="config-region-match"]').length`, &matches),
+		chromedp.Text(`[data-testid="config-commands"]`, &commands, chromedp.ByQuery),
+	); err != nil {
+		t.Fatalf("browser run against %s: %v", pinned, err)
+	}
+	if matches != 2 {
+		t.Errorf("%d regions marked as applying, want 2 (us and us-ny, not far)", matches)
+	}
+	for _, want := range []string{"set tx 22", "region def us us-ny"} {
+		if !strings.Contains(commands, want) {
+			t.Errorf("assembled preview %q, want it to contain %q", commands, want)
+		}
+	}
+	// Signed out, no editing controls anywhere on the page.
+	var controls int
+	if err := chromedp.Run(bctx, chromedp.Evaluate(
+		`document.querySelectorAll('[data-testid="config-region-add"],[data-testid="config-region-edit"],[data-testid="config-region-delete"]').length`,
+		&controls)); err != nil {
+		t.Fatalf("control count: %v", err)
+	}
+	if controls != 0 {
+		t.Errorf("anonymous view exposed %d region editing controls, want 0", controls)
+	}
+	watch.assertClean(t)
+}
+
+// TestE2ERegionIconTooltips: the region row's controls are icon-only, so each needs
+// to say what it does on hover/focus. Bootstrap tooltips are opt-in and initialized
+// once in ui.js against [data-tooltip]; without that wiring these silently fall back
+// to the browser's slow native tooltip, which is what prompted this.
+func TestE2ERegionIconTooltips(t *testing.T) {
+	srv := newE2EServer(t)
+	user, cookie := srv.login(t, "e2ergntip")
+	org, err := srv.store.CreateOrg(srv.ctx, "Region Tooltip Org", user.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	if _, err := srv.store.CreateRegion(srv.ctx, org.ID, store.RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(40, -80, 45, -75),
+	}); err != nil {
+		t.Fatalf("create region: %v", err)
+	}
+
+	bctx, cancel, watch := startBrowser(t)
+	defer cancel()
+
+	cfgURL := srv.appURL + "/orgs/" + org.Slug + "/config"
+	if err := chromedp.Run(bctx,
+		network.Enable(),
+		cdplog.Enable(),
+		setSessionCookie(cookie),
+		chromedp.Navigate(cfgURL),
+		chromedp.WaitVisible(`[data-testid="config-region-row"]`, chromedp.ByQuery),
+	); err != nil {
+		t.Fatalf("browser run against %s: %v", cfgURL, err)
+	}
+
+	// Focus is the reliable trigger headless (Bootstrap listens for hover *and*
+	// focus); the tooltip body is rendered into .tooltip-inner.
+	for _, c := range []struct{ testid, want string }{
+		{"config-region-area", "Edit area"},
+		{"config-region-edit", "Edit region"},
+		{"config-region-delete", "Delete region"},
+	} {
+		var got string
+		if err := chromedp.Run(bctx,
+			chromedp.Focus(`[data-testid="`+c.testid+`"]`, chromedp.ByQuery),
+			chromedp.WaitVisible(`.tooltip .tooltip-inner`, chromedp.ByQuery),
+			chromedp.Text(`.tooltip .tooltip-inner`, &got, chromedp.ByQuery),
+			chromedp.Blur(`[data-testid="`+c.testid+`"]`, chromedp.ByQuery),
+			// A dismissed tooltip lingers through its fade-out; without waiting for
+			// it to leave the DOM the next read picks up the previous one.
+			chromedp.WaitNotPresent(`.tooltip`, chromedp.ByQuery),
+		); err != nil {
+			t.Fatalf("%s tooltip: %v", c.testid, err)
+		}
+		if got != c.want {
+			t.Errorf("%s tooltip = %q, want %q", c.testid, got, c.want)
+		}
+	}
+	watch.assertClean(t)
+}
+
+// TestE2ERootFloodSwitchAutosubmits: the root (*) flood switch on the Configuration
+// page saves by itself — it's a data-autosubmit checkbox inside its own form nested
+// in a list row, so this proves the delegated handler reaches it and that the POST
+// round-trips (no inline handler, strict CSP).
+func TestE2ERootFloodSwitchAutosubmits(t *testing.T) {
+	srv := newE2EServer(t)
+	user, cookie := srv.login(t, "e2erootflood")
+	org, err := srv.store.CreateOrg(srv.ctx, "Root Flood Org", user.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	// Default is allow, so one click must land on deny.
+	if allow, err := srv.store.RootAllowFlood(srv.ctx, org.ID); err != nil || !allow {
+		t.Fatalf("root flood starts at (%v, %v), want (true, nil)", allow, err)
+	}
+
+	bctx, cancel, watch := startBrowser(t)
+	defer cancel()
+
+	sw := `[data-testid="config-region-root"] input[name="root_allow_flood"]`
+	var checked bool
+	cfgURL := srv.appURL + "/orgs/" + org.Slug + "/config"
+	if err := chromedp.Run(bctx,
+		network.Enable(),
+		cdplog.Enable(),
+		setSessionCookie(cookie),
+		chromedp.Navigate(cfgURL),
+		chromedp.WaitVisible(sw, chromedp.ByQuery),
+		// Clicking it submits the form; the page reloads with the switch off.
+		chromedp.Click(sw, chromedp.ByQuery),
+		chromedp.WaitVisible(sw, chromedp.ByQuery),
+		chromedp.Evaluate(`document.querySelector('`+sw+`').checked`, &checked),
+	); err != nil {
+		t.Fatalf("browser run against %s: %v", cfgURL, err)
+	}
+	if checked {
+		t.Error("the root flood switch should render unchecked after toggling it off")
+	}
+	// Polling is necessary rather than sloppy: form.submit() navigates
+	// asynchronously, so chromedp.Run can return before the POST has been handled.
+	// Wait for the write to land instead of assuming it already has.
+	denied := false
+	for i := 0; i < 25 && !denied; i++ {
+		allow, err := srv.store.RootAllowFlood(srv.ctx, org.ID)
+		if err != nil {
+			t.Fatalf("read root flood: %v", err)
+		}
+		if denied = !allow; !denied {
+			time.Sleep(200 * time.Millisecond)
+		}
+	}
+	if !denied {
+		t.Error("toggling the root flood switch did not persist a deny")
+	}
+	watch.assertClean(t)
+}
+
+// TestE2ERegionAreaDraftEnablesDrawing: the area workspace for a draft region — no
+// shape yet, which is how every region starts — initializes with the draw tools
+// ENABLED, where a region that already has an area has them disabled (one region,
+// one polygon). Covers the toolbar-toggling path in both directions.
+func TestE2ERegionAreaDraftEnablesDrawing(t *testing.T) {
+	srv := newE2EServer(t)
+	user, cookie := srv.login(t, "e2ergndraft")
+	org, err := srv.store.CreateOrg(srv.ctx, "Region Draft Org", user.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	draft, err := srv.store.CreateRegion(srv.ctx, org.ID, store.RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, AllowFlood: true,
+	})
+	if err != nil {
+		t.Fatalf("create draft region: %v", err)
+	}
+	shaped, err := srv.store.CreateRegion(srv.ctx, org.ID, store.RegionInput{
+		Token: "us", DisplayName: "United States", Layer: 1, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(20, -130, 50, -60),
+	})
+	if err != nil {
+		t.Fatalf("create shaped region: %v", err)
+	}
+
+	bctx, cancel, watch := startBrowser(t)
+	defer cancel()
+
+	// Geoman marks a disabled toolbar button on the anchor wrapping the icon, with
+	// both .pm-disabled and aria-disabled="true" (see _updateDisabled in
+	// leaflet-geoman.js). Reading aria-disabled keeps the assertion unambiguous.
+	drawDisabled := `(function () {
+		var icon = document.querySelector('.leaflet-pm-icon-polygon');
+		if (!icon) return 'missing';
+		var btn = icon.closest('a');
+		return btn ? btn.getAttribute('aria-disabled') : 'no-anchor';
+	})()`
+	areaURL := func(rid int64) string {
+		return srv.appURL + "/orgs/" + org.Slug + "/config/regions/" + strconv.FormatInt(rid, 10) + "/area"
+	}
+
+	// The draft: no area, drawing available.
+	var draftStatus string
+	var draftDrawDisabled string
+	if err := chromedp.Run(bctx,
+		network.Enable(),
+		cdplog.Enable(),
+		setSessionCookie(cookie),
+		chromedp.Navigate(areaURL(draft)),
+		chromedp.WaitVisible(`.leaflet-pm-icon-polygon`, chromedp.ByQuery),
+		chromedp.Text(`#region-area-status`, &draftStatus, chromedp.ByQuery),
+		chromedp.Evaluate(drawDisabled, &draftDrawDisabled),
+	); err != nil {
+		t.Fatalf("browser run against the draft's area page: %v", err)
+	}
+	if draftStatus != "No area yet" {
+		t.Errorf("draft area status = %q, want %q", draftStatus, "No area yet")
+	}
+	if draftDrawDisabled != "false" {
+		t.Errorf("draft draw button aria-disabled = %q, want %q — a draft's area page must leave the draw tools usable",
+			draftDrawDisabled, "false")
+	}
+
+	// The one that already has an area: drawing is off until it's cleared.
+	var shapedDrawDisabled string
+	if err := chromedp.Run(bctx,
+		chromedp.Navigate(areaURL(shaped)),
+		chromedp.WaitVisible(`#region-map .leaflet-overlay-pane path`, chromedp.ByQuery),
+		chromedp.Evaluate(drawDisabled, &shapedDrawDisabled),
+	); err != nil {
+		t.Fatalf("browser run against the shaped region's area page: %v", err)
+	}
+	if shapedDrawDisabled != "true" {
+		t.Errorf("shaped draw button aria-disabled = %q, want %q — one region holds one polygon, so drawing waits for a clear",
+			shapedDrawDisabled, "true")
+	}
+	watch.assertClean(t)
+}
+
+// TestE2ERegionAreaEditor: the area workspace loads the region's shape into the map,
+// draws its siblings as context, and saves the geometry the map produces — proving
+// the Leaflet/Geoman wiring works under the strict CSP (no inline handlers).
+func TestE2ERegionAreaEditor(t *testing.T) {
+	srv := newE2EServer(t)
+	user, cookie := srv.login(t, "e2ergnarea")
+	org, err := srv.store.CreateOrg(srv.ctx, "Region Area Org", user.ID)
+	if err != nil {
+		t.Fatalf("create org: %v", err)
+	}
+	// The region under edit already has an area, plus a sibling drawn for context.
+	rid, err := srv.store.CreateRegion(srv.ctx, org.ID, store.RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(40, -80, 45, -75),
+	})
+	if err != nil {
+		t.Fatalf("create region: %v", err)
+	}
+	if _, err := srv.store.CreateRegion(srv.ctx, org.ID, store.RegionInput{
+		Token: "us", DisplayName: "United States", Layer: 1, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(20, -130, 50, -60),
+	}); err != nil {
+		t.Fatalf("create sibling: %v", err)
+	}
+
+	bctx, cancel, watch := startBrowser(t)
+	defer cancel()
+
+	var status, hidden string
+	var paths int
+	// countPaths counts rendered vector layers: this region plus its one sibling. It
+	// is scoped to the overlay pane because Leaflet's attribution control contains a
+	// decorative SVG of its own.
+	countPaths := `document.querySelectorAll('#region-map .leaflet-overlay-pane path').length`
+	areaURL := srv.appURL + "/orgs/" + org.Slug + "/config/regions/" + strconv.FormatInt(rid, 10) + "/area"
+	if err := chromedp.Run(bctx,
+		network.Enable(),
+		cdplog.Enable(),
+		setSessionCookie(cookie),
+		chromedp.Navigate(areaURL),
+		// The map initializes and reports the existing area.
+		chromedp.WaitVisible(`#region-map .leaflet-container, #region-map.leaflet-container`, chromedp.ByQuery),
+		chromedp.WaitVisible(`#region-map .leaflet-overlay-pane path`, chromedp.ByQuery),
+		chromedp.Text(`#region-area-status`, &status, chromedp.ByQuery),
+		chromedp.Evaluate(countPaths, &paths),
+		chromedp.Value(`#region_geojson`, &hidden, chromedp.ByQuery),
+	); err != nil {
+		t.Fatalf("browser run against %s: %v", areaURL, err)
+	}
+	if status != "Custom area" {
+		t.Errorf("area status = %q, want %q", status, "Custom area")
+	}
+	if paths != 2 {
+		t.Errorf("rendered %d map polygons, want exactly 2 (the region + its sibling)", paths)
+	}
+	if !strings.Contains(hidden, "Polygon") {
+		t.Errorf("hidden geofence field = %q, want it to hold the polygon geometry", hidden)
+	}
+
+	// Clearing the area empties the field and flips the status, then saving persists
+	// the cleared state — the round trip the "Clear area" button exists for.
+	var clearedStatus, clearedValue string
+	if err := chromedp.Run(bctx,
+		chromedp.Click(`#region-area-clear`, chromedp.ByQuery),
+		chromedp.Text(`#region-area-status`, &clearedStatus, chromedp.ByQuery),
+		chromedp.Value(`#region_geojson`, &clearedValue, chromedp.ByQuery),
+		chromedp.Click(`[data-testid="save-area"]`, chromedp.ByQuery),
+		chromedp.WaitVisible(`[data-testid="config-region-row"]`, chromedp.ByQuery),
+	); err != nil {
+		t.Fatalf("clear-and-save run: %v", err)
+	}
+	if clearedStatus != "No area yet" {
+		t.Errorf("status after clear = %q, want %q", clearedStatus, "No area yet")
+	}
+	if clearedValue != "" {
+		t.Errorf("geofence field after clear = %q, want empty", clearedValue)
+	}
+	z, err := srv.store.GetRegion(srv.ctx, org.ID, rid)
+	if err != nil {
+		t.Fatalf("get region: %v", err)
+	}
+	if z.Geofence != nil {
+		t.Errorf("clearing the area should have persisted as a draft: %+v", z)
+	}
+	// The attributes survived a geometry-only save.
+	if z.Token != "buf" || z.DisplayName != "Buffalo" || z.Layer != 3 {
+		t.Errorf("saving the area disturbed the region's attributes: %+v", z)
 	}
-	// Initial: NY is primary, US is not.
-	if !ny0.PrimaryChecked || us0.PrimaryChecked {
-		t.Errorf("initial primary wrong: us=%v ny=%v", us0.PrimaryChecked, ny0.PrimaryChecked)
-	}
-	// After toggling US on, exactly US is primary (switch + hidden input), NY cleared.
-	if !us1.PrimaryChecked || us1.PrimaryHidden != "1" {
-		t.Errorf("US not primary after toggle: %+v", us1)
-	}
-	if ny1.PrimaryChecked || ny1.PrimaryHidden != "" {
-		t.Errorf("NY still primary after toggling US: %+v", ny1)
-	}
-
 	watch.assertClean(t)
 }
diff --git a/internal/store/config_profiles.go b/internal/store/config_profiles.go
index 225052b..42edd5d 100644
--- a/internal/store/config_profiles.go
+++ b/internal/store/config_profiles.go
@@ -75,9 +75,10 @@ type Profile struct {
 // Region is one node in an org's region hierarchy. Token is the MeshCore region
 // name used in `region def` (e.g. "buf"); DisplayName is the human label (e.g.
 // "Buffalo"); Layer is its depth and ordering in the chain (lower = nearer the
-// root). Geofence is nil for a region that applies everywhere. GeofenceJSON is the
-// raw stored GeoJSON (nil for a match-all region), carried verbatim so the editor
-// can round-trip an arbitrary polygon without collapsing it to its bounding box.
+// root). Geofence is nil for a draft — a region whose area hasn't been drawn yet,
+// which applies nowhere (see RegionMatches). GeofenceJSON is the raw stored GeoJSON,
+// carried verbatim so the editor can round-trip an arbitrary polygon without
+// collapsing it to its bounding box.
 type Region struct {
 	ID           int64
 	Token        string
@@ -89,8 +90,9 @@ type Region struct {
 	GeofenceJSON []byte
 }
 
-// ProfileInput / RegionInput are an org's config as submitted by the editor for a
-// full replace. GeofenceJSON is raw GeoJSON (nil/empty = everywhere).
+// ProfileInput / RegionInput are an org's config as submitted by the editor.
+// GeofenceJSON is raw GeoJSON; nil/empty leaves the region a draft (applies
+// nowhere) until an area is drawn.
 type ProfileInput struct {
 	Name  string
 	Steps []ConfigStep
@@ -248,20 +250,6 @@ func (s *Store) ReplaceOrgConfig(ctx context.Context, orgID int64, profiles []Pr
 	})
 }
 
-// ReplaceRegions replaces just an org's regions (profiles untouched) and sets the
-// org's root (*) flood policy, in one transaction. Regions are spatially
-// interdependent — parenting is derived from overlap — so the region editor sends
-// the full desired set each save.
-func (s *Store) ReplaceRegions(ctx context.Context, orgID int64, regions []RegionInput, rootAllowFlood bool) error {
-	return s.inTx(ctx, func(tx pgx.Tx) error {
-		if _, err := tx.Exec(ctx,
-			`UPDATE organizations SET root_allow_flood = $2 WHERE id = $1`, orgID, rootAllowFlood); err != nil {
-			return fmt.Errorf("set root flood: %w", err)
-		}
-		return replaceRegionsTx(ctx, tx, orgID, regions)
-	})
-}
-
 // RootAllowFlood reports whether flooding is allowed at the org's root region (*).
 func (s *Store) RootAllowFlood(ctx context.Context, orgID int64) (bool, error) {
 	var allow bool
@@ -356,6 +344,146 @@ func (s *Store) DeleteProfile(ctx context.Context, orgID, profileID int64) error
 	return nil
 }
 
+// Regions are edited one at a time (attributes in a modal, geometry on the area
+// page), so each of the following touches exactly one row. Contrast
+// ReplaceOrgConfig above, which still replaces an org's whole config wholesale for
+// seeding and imports.
+
+// CreateRegion inserts one region for an org and returns its id. GeofenceJSON may
+// be nil — that's a draft region whose area hasn't been drawn yet, which applies
+// nowhere until it has a shape (see RegionMatches). Returns ErrDuplicate if the org
+// already has a region with that token.
+func (s *Store) CreateRegion(ctx context.Context, orgID int64, z RegionInput) (int64, error) {
+	var id int64
+	err := s.inTx(ctx, func(tx pgx.Tx) error {
+		if err := clearOtherPrimaries(ctx, tx, orgID, 0, z.Primary); err != nil {
+			return err
+		}
+		return tx.QueryRow(ctx,
+			`INSERT INTO config_regions (org_id, token, display_name, layer, is_primary, allow_flood, geofence)
+			 VALUES ($1, $2, $3, $4, $5, $6, $7) RETURNING id`,
+			orgID, z.Token, z.DisplayName, z.Layer, z.Primary, z.AllowFlood, nilIfEmpty(z.GeofenceJSON)).Scan(&id)
+	})
+	if isUniqueViolation(err) {
+		return 0, ErrDuplicate
+	}
+	if err != nil {
+		return 0, fmt.Errorf("insert region %q: %w", z.Token, err)
+	}
+	return id, nil
+}
+
+// GetRegion returns a single region scoped to its org, or ErrNotFound if no such
+// region belongs to the org.
+func (s *Store) GetRegion(ctx context.Context, orgID, regionID int64) (*Region, error) {
+	var z Region
+	var raw []byte
+	err := s.pool.QueryRow(ctx,
+		`SELECT id, token, display_name, layer, is_primary, allow_flood, geofence
+		 FROM config_regions WHERE id = $1 AND org_id = $2`, regionID, orgID).
+		Scan(&z.ID, &z.Token, &z.DisplayName, &z.Layer, &z.Primary, &z.AllowFlood, &raw)
+	if err != nil {
+		return nil, notFoundOr(err, "get region")
+	}
+	if z.Geofence, err = geo.Parse(raw); err != nil {
+		return nil, fmt.Errorf("get region %d: %w", regionID, err)
+	}
+	z.GeofenceJSON = raw
+	return &z, nil
+}
+
+// UpdateRegion replaces a region's attributes, leaving its geofence alone — the
+// area is saved separately by UpdateRegionGeofence, so a failed attribute edit can
+// never discard a drawn shape. Returns ErrNotFound if the region isn't the org's,
+// or ErrDuplicate if the new token collides with another of its regions.
+func (s *Store) UpdateRegion(ctx context.Context, orgID, regionID int64, z RegionInput) error {
+	err := s.inTx(ctx, func(tx pgx.Tx) error {
+		if err := clearOtherPrimaries(ctx, tx, orgID, regionID, z.Primary); err != nil {
+			return err
+		}
+		tag, err := tx.Exec(ctx,
+			`UPDATE config_regions SET token = $3, display_name = $4, layer = $5, is_primary = $6, allow_flood = $7
+			 WHERE id = $1 AND org_id = $2`,
+			regionID, orgID, z.Token, z.DisplayName, z.Layer, z.Primary, z.AllowFlood)
+		if err != nil {
+			return fmt.Errorf("update region: %w", err)
+		}
+		if tag.RowsAffected() == 0 {
+			return ErrNotFound
+		}
+		return nil
+	})
+	if isUniqueViolation(err) {
+		return ErrDuplicate
+	}
+	return err
+}
+
+// UpdateRegionGeofence saves just a region's drawn area. A nil/empty geofence
+// clears it back to a draft. Returns ErrNotFound if the region isn't the org's.
+func (s *Store) UpdateRegionGeofence(ctx context.Context, orgID, regionID int64, geofence []byte) error {
+	tag, err := s.pool.Exec(ctx,
+		`UPDATE config_regions SET geofence = $3 WHERE id = $1 AND org_id = $2`,
+		regionID, orgID, nilIfEmpty(geofence))
+	if err != nil {
+		return fmt.Errorf("update region geofence: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// DeleteRegion removes a region, scoped to its org. Returns ErrNotFound if no such
+// region belongs to the org.
+func (s *Store) DeleteRegion(ctx context.Context, orgID, regionID int64) error {
+	tag, err := s.pool.Exec(ctx,
+		`DELETE FROM config_regions WHERE id = $1 AND org_id = $2`, regionID, orgID)
+	if err != nil {
+		return fmt.Errorf("delete region: %w", err)
+	}
+	if tag.RowsAffected() == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+// SetRootAllowFlood sets the org's root (*) flood policy on its own — the root
+// isn't a config_regions row, so it's toggled independently of any region.
+func (s *Store) SetRootAllowFlood(ctx context.Context, orgID int64, allow bool) error {
+	if _, err := s.pool.Exec(ctx,
+		`UPDATE organizations SET root_allow_flood = $2 WHERE id = $1`, orgID, allow); err != nil {
+		return fmt.Errorf("set root flood: %w", err)
+	}
+	return nil
+}
+
+// clearOtherPrimaries demotes the org's other primary regions so the one being
+// written can take the flag. keepID is excluded (0 when inserting). A no-op when
+// the region isn't becoming primary — turning the flag off never touches siblings.
+// This runs before the write, so config_regions_one_primary_idx never actually
+// fires; the index is there to keep the invariant if anything else writes the table.
+func clearOtherPrimaries(ctx context.Context, tx pgx.Tx, orgID, keepID int64, primary bool) error {
+	if !primary {
+		return nil
+	}
+	if _, err := tx.Exec(ctx,
+		`UPDATE config_regions SET is_primary = false WHERE org_id = $1 AND id <> $2 AND is_primary`,
+		orgID, keepID); err != nil {
+		return fmt.Errorf("clear other primary regions: %w", err)
+	}
+	return nil
+}
+
+// nilIfEmpty maps an empty geofence to nil so it lands as SQL NULL (a draft region)
+// rather than an empty JSONB value.
+func nilIfEmpty(b []byte) []byte {
+	if len(b) == 0 {
+		return nil
+	}
+	return b
+}
+
 // insertProfile inserts one profile row plus its steps, returning the new id.
 func insertProfile(ctx context.Context, tx pgx.Tx, orgID int64, name string, pos int, steps []ConfigStep) (int64, error) {
 	var pid int64
@@ -376,13 +504,9 @@ func replaceRegionsTx(ctx context.Context, tx pgx.Tx, orgID int64, regions []Reg
 		return fmt.Errorf("clear regions: %w", err)
 	}
 	for _, z := range regions {
-		var geofence []byte // nil → SQL NULL → everywhere
-		if len(z.GeofenceJSON) > 0 {
-			geofence = z.GeofenceJSON
-		}
 		if _, err := tx.Exec(ctx,
 			`INSERT INTO config_regions (org_id, token, display_name, layer, is_primary, allow_flood, geofence) VALUES ($1, $2, $3, $4, $5, $6, $7)`,
-			orgID, z.Token, z.DisplayName, z.Layer, z.Primary, z.AllowFlood, geofence); err != nil {
+			orgID, z.Token, z.DisplayName, z.Layer, z.Primary, z.AllowFlood, nilIfEmpty(z.GeofenceJSON)); err != nil {
 			return fmt.Errorf("insert region %q: %w", z.Token, err)
 		}
 	}
@@ -546,11 +670,18 @@ func floodCommand(name string, allow bool) string {
 	return "region denyf " + name
 }
 
-// RegionMatches reports whether a region applies at (lat, lon): a match-all region
-// always does; a geofenced one only when the location is known and inside it.
+// RegionMatches reports whether a region applies at (lat, lon): only when the
+// location is known and inside the region's geofence.
+//
+// A region with no geofence applies *nowhere*, not everywhere. Every row in
+// config_regions is a bounded area by definition — the only "applies everywhere"
+// region is the org root (*), which lives on the organizations row and is never a
+// region row. So a NULL geofence means a draft: a region created before its area
+// has been drawn. It stays out of every `region def` chain until it has a shape,
+// rather than silently applying to every repeater on the mesh.
 func RegionMatches(z Region, lat, lon *float64) bool {
 	if z.Geofence == nil {
-		return true
+		return false
 	}
 	return lat != nil && lon != nil && z.Geofence.Contains(*lat, *lon)
 }
diff --git a/internal/store/config_profiles_test.go b/internal/store/config_profiles_test.go
index 722154a..3b85467 100644
--- a/internal/store/config_profiles_test.go
+++ b/internal/store/config_profiles_test.go
@@ -153,7 +153,9 @@ func TestProfileCRUD(t *testing.T) {
 	}
 }
 
-func TestReplaceRegionsKeepsProfiles(t *testing.T) {
+// TestRegionWritesKeepProfiles: profiles and regions are independent halves of an
+// org's config, so writing regions (or the root flood policy) never disturbs them.
+func TestRegionWritesKeepProfiles(t *testing.T) {
 	t.Parallel()
 	st, ctx := orgTestStore(t)
 	owner, err := st.CreateUser(ctx, "rgnowner", "")
@@ -168,37 +170,276 @@ func TestReplaceRegionsKeepsProfiles(t *testing.T) {
 		t.Fatal(err)
 	}
 
-	if err := st.ReplaceRegions(ctx, org.ID, []RegionInput{
-		{Token: "country", DisplayName: "Country", Layer: 1, AllowFlood: true},
-		{Token: "metro", DisplayName: "Metro", Layer: 2, Primary: true, AllowFlood: true, GeofenceJSON: geo.Rectangle(10, 30, 20, 40)},
-	}, false); err != nil {
-		t.Fatalf("replace regions: %v", err)
+	country, err := st.CreateRegion(ctx, org.ID, RegionInput{Token: "country", DisplayName: "Country", Layer: 1, AllowFlood: true})
+	if err != nil {
+		t.Fatalf("create country: %v", err)
+	}
+	if _, err := st.CreateRegion(ctx, org.ID, RegionInput{
+		Token: "metro", DisplayName: "Metro", Layer: 2, Primary: true, AllowFlood: true,
+		GeofenceJSON: geo.Rectangle(10, 30, 20, 40),
+	}); err != nil {
+		t.Fatalf("create metro: %v", err)
+	}
+	if err := st.SetRootAllowFlood(ctx, org.ID, false); err != nil {
+		t.Fatalf("set root flood: %v", err)
 	}
-	// The root (*) flood policy round-trips (we passed deny above).
 	if allow, err := st.RootAllowFlood(ctx, org.ID); err != nil || allow {
 		t.Fatalf("root allow flood = %v (err %v), want false", allow, err)
 	}
-	// Regions saved and profiles untouched.
+
 	gotR, _ := st.ListRegions(ctx, org.ID)
 	if len(gotR) != 2 {
 		t.Fatalf("regions = %d, want 2", len(gotR))
 	}
 	gotP, _ := st.ListProfiles(ctx, org.ID)
 	if len(gotP) != 1 || gotP[0].Name != "Keep" {
-		t.Fatalf("profiles after region replace = %+v, want [Keep]", gotP)
+		t.Fatalf("profiles after region writes = %+v, want [Keep]", gotP)
 	}
 
-	// Replacing with an empty set clears regions but still keeps profiles.
-	if err := st.ReplaceRegions(ctx, org.ID, nil, true); err != nil {
-		t.Fatalf("clear regions: %v", err)
+	// Deleting every region likewise leaves the profiles alone.
+	if err := st.DeleteRegion(ctx, org.ID, country); err != nil {
+		t.Fatal(err)
 	}
-	gotR, _ = st.ListRegions(ctx, org.ID)
-	if len(gotR) != 0 {
-		t.Fatalf("regions after clear = %d, want 0", len(gotR))
+	for _, z := range gotR {
+		_ = st.DeleteRegion(ctx, org.ID, z.ID)
 	}
-	gotP, _ = st.ListProfiles(ctx, org.ID)
-	if len(gotP) != 1 {
-		t.Fatalf("profiles after clear = %d, want 1", len(gotP))
+	if gotR, _ = st.ListRegions(ctx, org.ID); len(gotR) != 0 {
+		t.Fatalf("regions after delete = %d, want 0", len(gotR))
+	}
+	if gotP, _ = st.ListProfiles(ctx, org.ID); len(gotP) != 1 {
+		t.Fatalf("profiles after region delete = %d, want 1", len(gotP))
+	}
+}
+
+// TestRegionCRUD covers the per-region write path the region editor uses: one row
+// at a time, with the geofence saved separately from the attributes.
+func TestRegionCRUD(t *testing.T) {
+	t.Parallel()
+	st, ctx := orgTestStore(t)
+	owner, err := st.CreateUser(ctx, "rgncrud", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	org, err := st.CreateOrg(ctx, "RgnCrudOrg", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Created without an area: a draft. Geofence stays NULL rather than becoming an
+	// empty shape, so RegionMatches keeps it out of every region def.
+	id, err := st.CreateRegion(ctx, org.ID, RegionInput{
+		Token: "buf", DisplayName: "Buffalo", Layer: 3, AllowFlood: true,
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	got, err := st.GetRegion(ctx, org.ID, id)
+	if err != nil {
+		t.Fatalf("get: %v", err)
+	}
+	if got.Token != "buf" || got.DisplayName != "Buffalo" || got.Layer != 3 || !got.AllowFlood {
+		t.Fatalf("get region = %+v", got)
+	}
+	if got.Geofence != nil || got.GeofenceJSON != nil {
+		t.Fatalf("draft region has a shape: %+v", got)
+	}
+
+	// Token collides within the org.
+	if _, err := st.CreateRegion(ctx, org.ID, RegionInput{Token: "buf", DisplayName: "Dup"}); err != ErrDuplicate {
+		t.Fatalf("duplicate token err = %v, want ErrDuplicate", err)
+	}
+
+	// Another org can't see or write it.
+	other, err := st.CreateOrg(ctx, "OtherRgnOrg", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := st.GetRegion(ctx, other.ID, id); err != ErrNotFound {
+		t.Fatalf("cross-org get err = %v, want ErrNotFound", err)
+	}
+	if err := st.UpdateRegion(ctx, other.ID, id, RegionInput{Token: "x"}); err != ErrNotFound {
+		t.Fatalf("cross-org update err = %v, want ErrNotFound", err)
+	}
+	if err := st.UpdateRegionGeofence(ctx, other.ID, id, geo.Rectangle(0, 0, 1, 1)); err != ErrNotFound {
+		t.Fatalf("cross-org geofence update err = %v, want ErrNotFound", err)
+	}
+
+	// Draw the area, then edit the attributes: the shape must survive an attribute
+	// edit, since the two are saved by separate requests.
+	box := geo.Rectangle(40, -80, 45, -75)
+	if err := st.UpdateRegionGeofence(ctx, org.ID, id, box); err != nil {
+		t.Fatalf("save geofence: %v", err)
+	}
+	if err := st.UpdateRegion(ctx, org.ID, id, RegionInput{
+		Token: "buf", DisplayName: "Buffalo NY", Layer: 4, AllowFlood: false,
+	}); err != nil {
+		t.Fatalf("update: %v", err)
+	}
+	got, _ = st.GetRegion(ctx, org.ID, id)
+	if got.DisplayName != "Buffalo NY" || got.Layer != 4 || got.AllowFlood {
+		t.Fatalf("after attribute update = %+v", got)
+	}
+	if got.Geofence == nil || !got.Geofence.Contains(42, -78) {
+		t.Fatalf("attribute update dropped the drawn area: %+v", got)
+	}
+
+	// Clearing the area returns it to a draft.
+	if err := st.UpdateRegionGeofence(ctx, org.ID, id, nil); err != nil {
+		t.Fatalf("clear geofence: %v", err)
+	}
+	if got, _ = st.GetRegion(ctx, org.ID, id); got.Geofence != nil {
+		t.Fatalf("cleared area still present: %+v", got)
+	}
+
+	// Delete, then the idempotency guard.
+	if err := st.DeleteRegion(ctx, org.ID, id); err != nil {
+		t.Fatalf("delete: %v", err)
+	}
+	if err := st.DeleteRegion(ctx, org.ID, id); err != ErrNotFound {
+		t.Fatalf("re-delete err = %v, want ErrNotFound", err)
+	}
+}
+
+// TestRegionPrimaryIsExclusive: at most one region per org is primary. This used to
+// be enforced by the bulk editor's JavaScript clearing the other switches; now the
+// write clears siblings in the same transaction, backed by a partial unique index.
+func TestRegionPrimaryIsExclusive(t *testing.T) {
+	t.Parallel()
+	st, ctx := orgTestStore(t)
+	owner, err := st.CreateUser(ctx, "rgnprimary", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	org, err := st.CreateOrg(ctx, "RgnPrimaryOrg", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// A second org's primary must be untouched by any of this.
+	otherOrg, err := st.CreateOrg(ctx, "RgnPrimaryOther", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := st.CreateRegion(ctx, otherOrg.ID, RegionInput{Token: "oth", DisplayName: "Other", Primary: true}); err != nil {
+		t.Fatal(err)
+	}
+
+	primaryToken := func(orgID int64) string {
+		t.Helper()
+		regions, err := st.ListRegions(ctx, orgID)
+		if err != nil {
+			t.Fatalf("list: %v", err)
+		}
+		var found []string
+		for _, z := range regions {
+			if z.Primary {
+				found = append(found, z.Token)
+			}
+		}
+		if len(found) > 1 {
+			t.Fatalf("org %d has %d primary regions: %v", orgID, len(found), found)
+		}
+		if len(found) == 0 {
+			return ""
+		}
+		return found[0]
+	}
+
+	a, err := st.CreateRegion(ctx, org.ID, RegionInput{Token: "a", DisplayName: "A", Primary: true})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got := primaryToken(org.ID); got != "a" {
+		t.Fatalf("primary after first create = %q, want a", got)
+	}
+
+	// Creating a second primary demotes the first.
+	if _, err := st.CreateRegion(ctx, org.ID, RegionInput{Token: "b", DisplayName: "B", Primary: true}); err != nil {
+		t.Fatalf("create second primary: %v", err)
+	}
+	if got := primaryToken(org.ID); got != "b" {
+		t.Fatalf("primary after second create = %q, want b", got)
+	}
+
+	// So does promoting one by update.
+	if err := st.UpdateRegion(ctx, org.ID, a, RegionInput{Token: "a", DisplayName: "A", Primary: true}); err != nil {
+		t.Fatalf("promote a: %v", err)
+	}
+	if got := primaryToken(org.ID); got != "a" {
+		t.Fatalf("primary after promoting a = %q, want a", got)
+	}
+
+	// Turning the flag off leaves the org with none — it must not promote a sibling.
+	if err := st.UpdateRegion(ctx, org.ID, a, RegionInput{Token: "a", DisplayName: "A", Primary: false}); err != nil {
+		t.Fatalf("demote a: %v", err)
+	}
+	if got := primaryToken(org.ID); got != "" {
+		t.Fatalf("primary after demoting a = %q, want none", got)
+	}
+
+	// The other org kept its own primary throughout.
+	if got := primaryToken(otherOrg.ID); got != "oth" {
+		t.Fatalf("other org's primary = %q, want oth", got)
+	}
+}
+
+// TestRegionPrimaryIndexIsEnforced checks that one-primary-per-org survives a
+// writer that doesn't go through CreateRegion/UpdateRegion, by inserting a second
+// primary with raw SQL. CreateRegion clears siblings first, so this partial unique
+// index (migration 0044) is otherwise never exercised — without this test nothing
+// would notice if the migration were dropped.
+func TestRegionPrimaryIndexIsEnforced(t *testing.T) {
+	t.Parallel()
+	st, ctx := orgTestStore(t)
+	owner, err := st.CreateUser(ctx, "rgnindex", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	org, err := st.CreateOrg(ctx, "RgnIndexOrg", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	raw := func(token string) error {
+		_, err := st.pool.Exec(ctx,
+			`INSERT INTO config_regions (org_id, token, display_name, layer, is_primary, allow_flood)
+			 VALUES ($1, $2, $2, 1, true, true)`, org.ID, token)
+		return err
+	}
+	if err := raw("first"); err != nil {
+		t.Fatalf("first raw primary insert: %v", err)
+	}
+	if err := raw("second"); !isUniqueViolation(err) {
+		t.Fatalf("second raw primary insert err = %v, want a unique violation", err)
+	}
+}
+
+// TestSetRootAllowFlood: the root (*) flood policy lives on the org, not as a
+// region row, so it toggles independently of any region.
+func TestSetRootAllowFlood(t *testing.T) {
+	t.Parallel()
+	st, ctx := orgTestStore(t)
+	owner, err := st.CreateUser(ctx, "rootflood", "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	org, err := st.CreateOrg(ctx, "RootFloodOrg", owner.ID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	// Default is allow.
+	if allow, err := st.RootAllowFlood(ctx, org.ID); err != nil || !allow {
+		t.Fatalf("default root flood = (%v, %v), want (true, nil)", allow, err)
+	}
+	if err := st.SetRootAllowFlood(ctx, org.ID, false); err != nil {
+		t.Fatalf("deny: %v", err)
+	}
+	if allow, err := st.RootAllowFlood(ctx, org.ID); err != nil || allow {
+		t.Fatalf("after deny = (%v, %v), want (false, nil)", allow, err)
+	}
+	if err := st.SetRootAllowFlood(ctx, org.ID, true); err != nil {
+		t.Fatalf("allow: %v", err)
+	}
+	if allow, _ := st.RootAllowFlood(ctx, org.ID); !allow {
+		t.Fatal("root flood did not toggle back to allow")
 	}
 }
 
@@ -247,6 +488,48 @@ func TestRegionDefCommands(t *testing.T) {
 	}
 }
 
+// TestRegionDefIgnoresDraftRegions: a draft region — one created but whose area
+// hasn't been drawn yet, so its geofence is NULL — must apply nowhere. Regression
+// test: RegionMatches used to report a nil geofence as a match, which made a
+// shapeless row apply to every repeater everywhere and inject its token into every
+// region def chain. "Everywhere" is the org root (*), which lives on the
+// organizations row, never as a config_regions row.
+func TestRegionDefIgnoresDraftRegions(t *testing.T) {
+	t.Parallel()
+
+	mk := func(token string, layer int, box []byte) Region {
+		shape, err := geo.Parse(box)
+		if err != nil {
+			t.Fatalf("parse %s: %v", token, err)
+		}
+		return Region{Token: token, Layer: layer, AllowFlood: true, Geofence: shape}
+	}
+	// draft sits at layer 2 with no shape — between us (L1) and buf (L3), so if it
+	// matched it would also wedge itself into the middle of the chain.
+	regions := []Region{
+		mk("us", 1, geo.Rectangle(0, 0, 100, 100)),
+		mk("draft", 2, nil),
+		mk("buf", 3, geo.Rectangle(12, 12, 18, 18)),
+	}
+
+	// Inside us + buf: the draft must not appear, and must not re-parent buf.
+	got := RegionDefCommands(regions, true, ptr(15.0), ptr(15.0))
+	if len(got) == 0 || got[0] != "region def us buf" {
+		t.Fatalf("inside = %v, want first line %q", got, "region def us buf")
+	}
+	for _, line := range got {
+		if strings.Contains(line, "draft") {
+			t.Errorf("draft region leaked into %q (full %v)", line, got)
+		}
+	}
+
+	// Outside every drawn area: no commands at all. A draft must not be the reason
+	// a config gets emitted — that's the `denyf *` safety guard.
+	if got := RegionDefCommands(regions, true, ptr(-5.0), ptr(-5.0)); got != nil {
+		t.Fatalf("outside with a draft present = %v, want nil", got)
+	}
+}
+
 func TestRegionDefFloodCommands(t *testing.T) {
 	t.Parallel()
 	mk := func(token string, layer int, allow bool, box []byte) Region {
@@ -346,8 +629,7 @@ func TestListRepeaterConfigOrgs(t *testing.T) {
 	}
 	// B: owner is a member, region-only config (no profiles) → included, empty profiles.
 	orgB, _ := st.CreateOrg(ctx, "Bravo", owner.ID)
-	if err := st.ReplaceRegions(ctx, orgB.ID,
-		[]RegionInput{{Token: "x", DisplayName: "X", Layer: 1}}, true); err != nil {
+	if _, err := st.CreateRegion(ctx, orgB.ID, RegionInput{Token: "x", DisplayName: "X", Layer: 1}); err != nil {
 		t.Fatal(err)
 	}
 	// C: owner is a member but the org has NO config → excluded.
diff --git a/internal/store/migrations/0044_region_one_primary.sql b/internal/store/migrations/0044_region_one_primary.sql
new file mode 100644
index 0000000..bc70dd9
--- /dev/null
+++ b/internal/store/migrations/0044_region_one_primary.sql
@@ -0,0 +1,19 @@
+-- +goose Up
+-- Regions are edited one at a time now (per-region CRUD) rather than replaced as a
+-- whole set, so "at most one primary region per org" can no longer be enforced by
+-- the editor's JavaScript clearing the other switches. CreateRegion/UpdateRegion
+-- clear any other primary in the same transaction; this index is the backstop that
+-- keeps the invariant true no matter who writes the table.
+--
+-- Existing data can hold more than one primary (the old bulk editor only enforced
+-- exclusivity client-side), so demote all but the lowest-id primary per org before
+-- the unique index goes on.
+UPDATE config_regions SET is_primary = false
+WHERE is_primary
+  AND id NOT IN (SELECT min(id) FROM config_regions WHERE is_primary GROUP BY org_id);
+
+CREATE UNIQUE INDEX config_regions_one_primary_idx
+    ON config_regions (org_id) WHERE is_primary;
+
+-- +goose Down
+DROP INDEX config_regions_one_primary_idx;
diff --git a/internal/web/orgview.go b/internal/web/orgview.go
index 071f5ad..c915856 100644
--- a/internal/web/orgview.go
+++ b/internal/web/orgview.go
@@ -22,34 +22,155 @@ type ProfileView struct {
 	Steps []store.ConfigStep
 }
 
+// RegionPalette is the set of translucent fills used to tell regions apart, both as
+// the legend's swatches and as the polygon colors on every region map. It lives here
+// rather than in regionmap.js so one ordering drives both — a swatch can't drift
+// from the shape it labels. Templates pass each region's Color through to the map.
+var RegionPalette = []string{
+	"#4dabf7", "#f783ac", "#69db7c", "#ffa94d",
+	"#9775fa", "#ffd43b", "#3bc9db", "#ff8787",
+}
+
+// RegionColor returns the palette entry for the i-th region, wrapping around.
+func RegionColor(i int) string { return RegionPalette[i%len(RegionPalette)] }
+
+// RegionView is one region for display, mirroring ProfileView: it carries ID so the
+// admin surface can build its edit/area/delete URLs from the same list the
+// read-only view renders. HasShape is false for a draft — a region created before
+// its area was drawn, which applies nowhere until it has one. Matches reports
+// whether the region covers the previewed location (always false without one), which
+// drives the highlighting that explains why a token appears in the assembled config.
+type RegionView struct {
+	ID          int64
+	DisplayName string
+	Token       string
+	Layer       int
+	Primary     bool
+	AllowFlood  bool
+	HasShape    bool
+	Matches     bool
+	Color       string
+	Depth       int
+}
+
+// maxRegionDepth caps legend indentation. Layers are arbitrary integers, so a deep
+// tree would otherwise indent a row off the side of a narrow column.
+const maxRegionDepth = 4
+
+// assignRegionDepths sets each row's Depth to the rank of its layer among the
+// distinct layers present, not the layer number itself: an org whose only regions
+// are layers 2 and 7 reads as two nested levels rather than seven. Regions arrive
+// ordered by (layer, token) from ListRegions, so a single pass suffices.
+func assignRegionDepths(rows []RegionView) {
+	depth := -1
+	prev := 0
+	for i := range rows {
+		if depth < 0 || rows[i].Layer != prev {
+			depth++
+			prev = rows[i].Layer
+		}
+		rows[i].Depth = min(depth, maxRegionDepth)
+	}
+}
+
 // ConfigView is an org's configuration for display: its named profiles (with one
-// selected for its base settings) and its regions, kept independent. The regions
-// themselves aren't listed here — they surface only through the location picker —
-// so this carries just what that map needs. PreviewActive is true when a location
-// was supplied.
+// selected for its base settings) and its regions, kept independent. Regions are
+// listed as the map's legend and drawn on the map itself, so this carries both the
+// rows and the geometry. PreviewActive is true when a location was supplied.
+//
+// The map frames itself from the shapes it draws (and the previewed point), so there
+// is no server-computed bounding box.
 type ConfigView struct {
 	HasConfig       bool
 	Profiles        []ProfileView
 	Selected        string
 	SelectedSteps   []store.ConfigStep
-	HasRegions      bool      // org defines at least one region
-	HasRegionShapes bool      // some region has a geofence (so the picker map is useful)
-	MapBounds       []float64 // {minLat, minLon, maxLat, maxLon} framing all geofences, or nil
-	RegionDef       []string  // region def/save commands for the previewed location
+	Regions         []RegionView
+	MapRegions      []MapRegion // the shaped regions, as the read-only map draws them
+	HasRegions      bool        // org defines at least one region
+	HasRegionShapes bool        // some region has a geofence (so the picker map is useful)
+	RootAllowFlood  bool        // the org root (*) flood policy — not a region row
+	RegionDef       []string    // region def/save commands for the previewed location
 	PreviewActive   bool
 }
 
-// bbox accumulates a lat/lon bounding box. A nil *bbox is empty, so extend can be
-// chained from nil to fold in the first point/box.
-type bbox struct{ minLat, minLon, maxLat, maxLon float64 }
+// MapRegion is one region as the read-only config map draws it — the payload handed
+// to regionMapView. Only regions with an area appear; a draft has nothing to draw.
+// Color comes from RegionPalette by the same index the legend swatch uses, so the
+// two always agree.
+//
+// This ships every region's geometry with the page. That is fine for the handful of
+// hand-drawn polygons an org defines; if imported administrative boundaries ever
+// make these large, serve them from their own endpoint (or simplify for display)
+// rather than growing the HTML.
+type MapRegion struct {
+	Name    string `json:"name"`
+	GeoJSON string `json:"geojson"`
+	Matched bool   `json:"matched"`
+	Color   string `json:"color"`
+	// Primary marks the org's primary region, which the map opens framed on — that
+	// is where the org actually operates, so a nationwide parent region shouldn't
+	// force a continental view.
+	Primary bool `json:"primary"`
+}
 
-func (b *bbox) extend(minLat, minLon, maxLat, maxLon float64) *bbox {
-	if b == nil {
-		return &bbox{minLat, minLon, maxLat, maxLon}
+// ConfigLine is one line of the assembled config preview. FromRegion marks the lines
+// contributed by the previewed location's regions rather than by the profile, so the
+// page can show which came from where. IsMarker is the {{ region }} placeholder,
+// rendered as a hint when no location is picked instead of leaking its literal text.
+type ConfigLine struct {
+	Text       string
+	IsComment  bool
+	IsMarker   bool
+	FromRegion bool
+}
+
+// AssembledLines renders the selected profile and the previewed location's region
+// commands as the single ordered list a repeater owner would actually run: the
+// profile's steps with the region block spliced in at its {{ region }} marker, or
+// appended after every step when it has none.
+//
+// This is the same assembly the console (console_config.go) and serial setup
+// (repeater_setup.go) perform via store.SplitAtRegionMarker — the page used to show
+// the two halves as separate blocks and leave the merge to the reader, which meant
+// it displayed something subtly different from what those surfaces emit.
+//
+// With no location picked there are no region lines, and the marker survives as
+// IsMarker so the page can say where they will land.
+func (cv ConfigView) AssembledLines() []ConfigLine {
+	before, after := store.SplitAtRegionMarker(cv.SelectedSteps)
+	// No marker means SplitAtRegionMarker put everything in before; the region block
+	// then follows all of it, which is the documented default.
+	hasMarker := len(after) > 0 || len(before) != len(cv.SelectedSteps)
+
+	out := make([]ConfigLine, 0, len(cv.SelectedSteps)+len(cv.RegionDef))
+	emit := func(steps []store.ConfigStep) {
+		for _, st := range steps {
+			if st.IsComment() {
+				out = append(out, ConfigLine{Text: st.Comment, IsComment: true})
+				continue
+			}
+			out = append(out, ConfigLine{Text: st.CommandLine})
+		}
 	}
-	b.minLat, b.minLon = min(b.minLat, minLat), min(b.minLon, minLon)
-	b.maxLat, b.maxLon = max(b.maxLat, maxLat), max(b.maxLon, maxLon)
-	return b
+	region := func() {
+		if len(cv.RegionDef) == 0 {
+			// Nothing to splice: keep the marker visible so the page can explain that
+			// region commands land here once a location is picked.
+			if hasMarker {
+				out = append(out, ConfigLine{IsMarker: true})
+			}
+			return
+		}
+		for _, line := range cv.RegionDef {
+			out = append(out, ConfigLine{Text: line, FromRegion: true})
+		}
+	}
+
+	emit(before)
+	region()
+	emit(after)
+	return out
 }
 
 // BuildConfigView loads an org's profiles and regions for read-only display.
@@ -88,40 +209,36 @@ func BuildConfigView(ctx context.Context, st *store.Store, orgID int64, selected
 	// none is set (or it has no shape), fall back to the org's public repeaters;
 	// failing that, the union of all geofences. (The picker only renders when
 	// HasRegionShapes, so a usable box almost always exists.)
-	var union *bbox
-	for _, z := range regions {
+	for i, z := range regions {
+		matched := lat != nil && lon != nil && store.RegionMatches(z, lat, lon)
+		if len(z.GeofenceJSON) > 0 {
+			cv.MapRegions = append(cv.MapRegions, MapRegion{
+				Name: z.DisplayName, GeoJSON: string(z.GeofenceJSON),
+				Matched: matched, Color: RegionColor(i), Primary: z.Primary,
+			})
+		}
+		cv.Regions = append(cv.Regions, RegionView{
+			ID: z.ID, DisplayName: z.DisplayName, Token: z.Token, Layer: z.Layer,
+			Primary: z.Primary, AllowFlood: z.AllowFlood, HasShape: len(z.GeofenceJSON) > 0,
+			// RegionMatches is the same predicate RegionDefCommands uses to decide
+			// which tokens ship, so the highlight can't disagree with the commands.
+			Matches: matched,
+			Color:   RegionColor(i),
+		})
 		if len(z.GeofenceJSON) > 0 {
 			cv.HasRegionShapes = true
 		}
-		if a, b, c, d, ok := z.Geofence.Bounds(); ok {
-			union = union.extend(a, b, c, d)
-			if z.Primary {
-				cv.MapBounds = []float64{a, b, c, d}
-			}
-		}
 	}
-	if cv.MapBounds == nil {
-		if reps, err := st.ListPublicRepeaters(ctx, orgID); err == nil {
-			var rb *bbox
-			for _, rp := range reps {
-				if rp.HasLocation {
-					rb = rb.extend(rp.Lat, rp.Lon, rp.Lat, rp.Lon)
-				}
-			}
-			if rb != nil {
-				cv.MapBounds = []float64{rb.minLat, rb.minLon, rb.maxLat, rb.maxLon}
-			}
-		}
-	}
-	if cv.MapBounds == nil && union != nil {
-		cv.MapBounds = []float64{union.minLat, union.minLon, union.maxLat, union.maxLon}
+	assignRegionDepths(cv.Regions)
+	// The root (*) flood policy isn't a region row, so it's fetched separately — one
+	// PK lookup on the org, needed both by the admin's root switch and by the region
+	// def preview.
+	cv.RootAllowFlood, err = st.RootAllowFlood(ctx, orgID)
+	if err != nil {
+		return ConfigView{}, err
 	}
 	if cv.PreviewActive {
-		rootAllow, err := st.RootAllowFlood(ctx, orgID)
-		if err != nil {
-			return ConfigView{}, err
-		}
-		cv.RegionDef = store.RegionDefCommands(regions, rootAllow, lat, lon)
+		cv.RegionDef = store.RegionDefCommands(regions, cv.RootAllowFlood, lat, lon)
 	}
 	return cv, nil
 }
@@ -134,8 +251,8 @@ type OrgNavArgs struct {
 	Slug   string
 	Active string // "home" | "members" | "repeaters" | "config"
 	// IsMember gates the Members tab (personal info), so it's false on public views
-	// even when a member is previewing. IsAdmin gates the "Edit configuration"
-	// action.
+	// even when a member is previewing. IsAdmin keeps the Configuration tab visible
+	// on an org that hasn't defined any config yet, so an admin can go and create it.
 	IsMember bool
 	IsAdmin  bool
 	// Manage selects the header's right-side controls: true renders the member
diff --git a/internal/web/orgview_test.go b/internal/web/orgview_test.go
new file mode 100644
index 0000000..73e7cdd
--- /dev/null
+++ b/internal/web/orgview_test.go
@@ -0,0 +1,137 @@
+package web
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/jleight/meshtender/internal/store"
+)
+
+// lines flattens an assembled preview into "kind:text" tokens, so a test can assert
+// ordering and provenance in one comparison.
+func lines(t *testing.T, cv ConfigView) []string {
+	t.Helper()
+	var out []string
+	for _, l := range cv.AssembledLines() {
+		switch {
+		case l.IsMarker:
+			out = append(out, "marker:")
+		case l.IsComment:
+			out = append(out, "note:"+l.Text)
+		case l.FromRegion:
+			out = append(out, "region:"+l.Text)
+		default:
+			out = append(out, "cmd:"+l.Text)
+		}
+	}
+	return out
+}
+
+func eq(t *testing.T, got, want []string, label string) {
+	t.Helper()
+	if strings.Join(got, "|") != strings.Join(want, "|") {
+		t.Errorf("%s:\n got %v\nwant %v", label, got, want)
+	}
+}
+
+// TestAssembledLinesSplicesAtMarker: region commands land where the profile's
+// {{ region }} marker sits, and the marker itself never reaches the page as literal
+// text.
+func TestAssembledLinesSplicesAtMarker(t *testing.T) {
+	t.Parallel()
+	cv := ConfigView{
+		SelectedSteps: []store.ConfigStep{
+			{CommandLine: "set tx 22"},
+			{Comment: "tune later"},
+			{CommandLine: store.RegionMarker},
+			{CommandLine: "set repeat on"},
+		},
+		RegionDef: []string{"region def us", "region save"},
+	}
+	eq(t, lines(t, cv), []string{
+		"cmd:set tx 22",
+		"note:tune later",
+		"region:region def us",
+		"region:region save",
+		"cmd:set repeat on",
+	}, "spliced at marker")
+
+	for _, l := range cv.AssembledLines() {
+		if strings.Contains(l.Text, "{{") {
+			t.Errorf("the region marker leaked into the preview as %q", l.Text)
+		}
+	}
+}
+
+// TestAssembledLinesAppendsWithoutMarker: with no marker the region block follows
+// every profile step — the documented default.
+func TestAssembledLinesAppendsWithoutMarker(t *testing.T) {
+	t.Parallel()
+	cv := ConfigView{
+		SelectedSteps: []store.ConfigStep{{CommandLine: "set tx 22"}, {CommandLine: "set repeat on"}},
+		RegionDef:     []string{"region def us", "region save"},
+	}
+	eq(t, lines(t, cv), []string{
+		"cmd:set tx 22",
+		"cmd:set repeat on",
+		"region:region def us",
+		"region:region save",
+	}, "appended without marker")
+}
+
+// TestAssembledLinesWithoutLocation: with no location picked there are no region
+// commands. A profile that has a marker keeps it as a placeholder the page can
+// explain; one without a marker simply shows its steps.
+func TestAssembledLinesWithoutLocation(t *testing.T) {
+	t.Parallel()
+	withMarker := ConfigView{SelectedSteps: []store.ConfigStep{
+		{CommandLine: "set tx 22"},
+		{CommandLine: store.RegionMarker},
+		{CommandLine: "set repeat on"},
+	}}
+	eq(t, lines(t, withMarker), []string{"cmd:set tx 22", "marker:", "cmd:set repeat on"},
+		"no location, marker present")
+
+	noMarker := ConfigView{SelectedSteps: []store.ConfigStep{{CommandLine: "set tx 22"}}}
+	eq(t, lines(t, noMarker), []string{"cmd:set tx 22"}, "no location, no marker")
+
+	// Region-only org: nothing selected, but a picked location still previews.
+	regionOnly := ConfigView{RegionDef: []string{"region def us", "region save"}}
+	eq(t, lines(t, regionOnly), []string{"region:region def us", "region:region save"},
+		"regions with no profile")
+
+	// Empty config assembles to nothing rather than a stray marker.
+	var empty ConfigView
+	if got := empty.AssembledLines(); len(got) != 0 {
+		t.Errorf("empty config assembled to %v, want nothing", got)
+	}
+}
+
+// TestAssembledLinesMarkerOnlyProfile: a profile that is nothing but the marker
+// yields exactly the region block.
+func TestAssembledLinesMarkerOnlyProfile(t *testing.T) {
+	t.Parallel()
+	cv := ConfigView{
+		SelectedSteps: []store.ConfigStep{{CommandLine: store.RegionMarker}},
+		RegionDef:     []string{"region def us"},
+	}
+	eq(t, lines(t, cv), []string{"region:region def us"}, "marker-only profile")
+}
+
+// TestRegionColorWrapsAround: every region gets a color, and the palette repeats
+// rather than running out, so the legend swatch always matches a drawn polygon.
+func TestRegionColorWrapsAround(t *testing.T) {
+	t.Parallel()
+	if RegionColor(0) != RegionPalette[0] {
+		t.Fatalf("RegionColor(0) = %q, want %q", RegionColor(0), RegionPalette[0])
+	}
+	n := len(RegionPalette)
+	if RegionColor(n) != RegionPalette[0] || RegionColor(n+2) != RegionPalette[2] {
+		t.Fatalf("palette did not wrap: %q, %q", RegionColor(n), RegionColor(n+2))
+	}
+	for i := 0; i < n*2; i++ {
+		if RegionColor(i) == "" {
+			t.Fatalf("RegionColor(%d) is empty", i)
+		}
+	}
+}
diff --git a/internal/web/static/regionmap.js b/internal/web/static/regionmap.js
index 606904e..bf61b9e 100644
--- a/internal/web/static/regionmap.js
+++ b/internal/web/static/regionmap.js
@@ -1,15 +1,27 @@
 // regionmap.js — Leaflet + Geoman map for org config regions.
 //
-// A region's geofence is a GeoJSON Polygon/MultiPolygon geometry; an empty
-// geometry means "applies everywhere" (no shape on the map). Two entry points:
+// A region's geofence is a GeoJSON Polygon/MultiPolygon geometry; no geometry means
+// the region is a draft that applies nowhere until an area is drawn. Two entry
+// points:
 //
-//   initRegionEditor(mapId, listId)  — the admin editor: draw/edit one polygon
-//       per region block, with every region shown at once so overlaps are visible.
-//   regionMapView(mapId, regions, preview) — read-only: render every region's
-//       polygon (and an optional previewed location marker).
+//   initRegionArea(mapId, opts)  — the admin area workspace: draw/edit exactly one
+//       region's polygon, with the org's other regions outlined as read-only context.
+//   regionMapView(mapId, opts) — read-only: a location picker (with an optional
+//       previewed location marker).
 (function () {
-  // Distinct translucent fills so overlapping regions read as layered colors.
-  var PALETTE = ["#4dabf7", "#f783ac", "#69db7c", "#ffa94d", "#9775fa", "#ffd43b", "#3bc9db", "#ff8787"];
+  // Colors come from the server (web.RegionPalette) so a legend swatch and the
+  // polygon it labels can never drift apart. FALLBACK covers a caller that passes
+  // none.
+  var FALLBACK = "#4dabf7";
+
+  // Breathing room when framing a map. FIT_PADDING is in screen pixels, so it stays
+  // a consistent visual margin no matter how large the area is — a geographic pad
+  // would scale with the region and zoom a big one right back out. PRIMARY_CONTEXT
+  // is the small geographic nudge that shows a little of what surrounds the primary
+  // region; keep it low, because fitBounds then rounds *down* to an integer zoom and
+  // any slack here gets magnified by that rounding.
+  var FIT_PADDING = [24, 24];
+  var PRIMARY_CONTEXT = 0.08;
 
   // baseLayers adds the dark (default) and a light basemap with a layers control to
   // toggle between them, remembering the choice in localStorage (shared with
@@ -44,14 +56,36 @@
     });
   }
 
-  function styleFor(i, active) {
-    var c = PALETTE[i % PALETTE.length];
+  // editableStyle is the one shape the current page can modify: drawn prominently so
+  // it always reads which polygon the tools will act on.
+  function editableStyle(color) {
+    var c = color || FALLBACK;
+    return { color: c, weight: 3, opacity: 1, fillColor: c, fillOpacity: 0.25 };
+  }
+
+  // Region fills stack: nested regions overlap, so N of them at opacity a cover
+  // 1-(1-a)^N of the basemap. Orgs run deep hierarchies (3 levels is common, 5-6 is
+  // planned), and at a=0.25 six levels reach 82% — the map underneath disappears.
+  // These are chosen so six levels stay readable (~43% matched, ~22% context) while
+  // three land at ~25%, the weight a single region used to carry. Raise them and
+  // deep hierarchies turn to mud; the stroke, not the fill, is what identifies a
+  // region.
+  var FILL_MATCHED = 0.09;
+  var FILL_CONTEXT = 0.04;
+
+  // outlineStyle is a region drawn for reference — a neighbor on the area editor, or
+  // any region on the read-only config map. Dimmed by default; a region that applies
+  // at the previewed location is brought forward, which is what explains why its
+  // token shows up in the assembled config.
+  function outlineStyle(color, matched) {
+    var c = color || FALLBACK;
     return {
       color: c,
-      weight: active ? 3 : 1.5,
-      opacity: active ? 1 : 0.6,
+      weight: matched ? 3 : 1.5,
+      opacity: matched ? 1 : 0.55,
       fillColor: c,
-      fillOpacity: active ? 0.25 : 0.1,
+      fillOpacity: matched ? FILL_MATCHED : FILL_CONTEXT,
+      interactive: false,
     };
   }
 
@@ -82,15 +116,31 @@
     }
   }
 
-  // ---- Editor -------------------------------------------------------------
+  // ---- Area editor (one region) -------------------------------------------
 
-  window.initRegionEditor = function (mapId, listId) {
-    var listEl = document.getElementById(listId);
-    if (!listEl) return;
+  // initRegionArea drives the per-region area workspace. It edits exactly one
+  // shape — the region whose page this is — and renders the org's other regions as
+  // non-interactive outlines for spatial reference. opts:
+  //   input    — id of the hidden field carrying the GeoJSON geometry (required);
+  //   status   — id of an element to show "Custom area" / "No area yet" in;
+  //   clear    — id of a button that removes the shape;
+  //   name     — this region's label, used in the shape's tooltip;
+  //   color    — this region's palette color (see web.RegionPalette);
+  //   siblings — [{name, geojson, color}] drawn read-only.
+  //
+  // Everything the form submits lives in the hidden input, so the server sees the
+  // same shape whether it was drawn, edited, or cleared.
+  window.initRegionArea = function (mapId, opts) {
+    opts = opts || {};
+    var input = document.getElementById(opts.input);
+    if (!input) return;
+    var statusEl = opts.status ? document.getElementById(opts.status) : null;
     var map = L.map(mapId);
     baseLayers(map);
 
-    // Geoman toolbar: only the tools that make sense for area geofences.
+    // Geoman toolbar: only the tools that make sense for an area geofence. Drawing
+    // is enabled only while there's no shape — one region, one polygon, so a second
+    // draw would be ambiguous.
     map.pm.addControls({
       position: "topleft",
       drawMarker: false,
@@ -108,157 +158,76 @@
     });
     map.pm.setGlobalOptions({ allowSelfIntersection: false });
 
-    var blocks = []; // { el, hidden, status, layer }
-    var active = null;
-    var banner = document.getElementById(mapId + "-active");
+    var layer = null;
 
-    // While a polygon is being drawn, clicks place vertices — they must not be
-    // treated as region selections. drawTarget locks onto the region that was
-    // selected when drawing began, captured here so a vertex landing on top of
-    // another region's polygon can't hijack the selection mid-draw.
-    var drawing = false;
-    var drawTarget = null;
-    map.on("pm:drawstart", function () { drawing = true; drawTarget = active; });
-    map.on("pm:drawend", function () { drawing = false; });
-
-    function setStatus(b) {
-      if (b.status) b.status.textContent = b.layer ? "Custom area" : "No area yet";
-    }
-    function serialize(b) {
-      b.hidden.value = b.layer ? geomString(b.layer) : "";
-      setStatus(b);
-    }
-    function restyle() {
-      blocks.forEach(function (b, i) {
-        if (b.layer && b.layer.setStyle) b.layer.setStyle(styleFor(i, b === active));
-      });
-    }
-    function setActive(b) {
-      active = b;
-      blocks.forEach(function (x) {
-        var on = x === b;
-        x.el.classList.toggle("region-active", on);
-        // The Edit-area button is the visible selection affordance: it lights up
-        // and reads "Editing area" for the active region, "Edit area" otherwise.
-        if (x.edit) {
-          x.edit.classList.toggle("btn-primary", on);
-          x.edit.textContent = on ? "Editing area" : "Edit area";
-        }
-      });
-      if (banner) banner.textContent = b ? regionName(b) : "—";
-      restyle();
-    }
-    function regionName(b) {
-      var display = b.el.querySelector('input[name="region_display"]');
-      var token = b.el.querySelector('input[name="region_token"]');
-      return (display && display.value.trim()) || (token && token.value.trim()) || "this region";
+    function serialize() {
+      input.value = layer ? geomString(layer) : "";
+      if (statusEl) statusEl.textContent = layer ? "Custom area" : "No area yet";
+      // With a shape present, drawing is off (edit/drag/remove stay on); once it's
+      // cleared, the draw tools come back.
+      map.pm.Toolbar.setButtonDisabled("drawPolygon", !!layer);
+      map.pm.Toolbar.setButtonDisabled("drawRectangle", !!layer);
     }
 
-    function bindLayer(b, layer) {
-      layer.addTo(map);
+    function bind(l) {
+      layer = l;
+      l.setStyle(editableStyle(opts.color));
+      if (opts.name) l.bindTooltip(String(opts.name), { sticky: true });
+      l.addTo(map);
       // Re-serialize after any vertex edit or whole-shape drag.
-      layer.on("pm:edit pm:update pm:dragend pm:markerdragend", function () { serialize(b); });
-      layer.on("click", function () { if (!drawing) setActive(b); });
-      b.layer = layer;
+      l.on("pm:edit pm:update pm:dragend pm:markerdragend", serialize);
+      serialize();
     }
-    function attach(b, layer) {
-      if (b.layer) map.removeLayer(b.layer); // one shape per region
-      bindLayer(b, layer);
-      serialize(b);
-      restyle();
-    }
-    function clearShape(b) {
-      if (b.layer) {
-        map.removeLayer(b.layer);
-        b.layer = null;
+
+    function clear() {
+      if (layer) {
+        map.removeLayer(layer);
+        layer = null;
       }
-      serialize(b);
+      serialize();
     }
 
-    // reconcile() syncs our block list with the DOM, which the page mutates as
-    // the admin adds/removes region blocks (addBlock/removeBlock in the template).
-    function reconcile() {
-      var els = Array.prototype.slice.call(listEl.querySelectorAll(".region-block"));
-      // Drop blocks whose DOM node is gone.
-      blocks = blocks.filter(function (b) {
-        if (els.indexOf(b.el) === -1) {
-          if (b.layer) map.removeLayer(b.layer);
-          if (active === b) active = null;
-          return false;
-        }
-        return true;
-      });
-      // Register newly added blocks.
-      var added = [];
-      els.forEach(function (el) {
-        if (blocks.some(function (b) { return b.el === el; })) return;
-        var b = {
-          el: el,
-          hidden: el.querySelector('input[name="region_geojson"]'),
-          status: el.querySelector(".region-shape-status"),
-          edit: el.querySelector(".region-edit-btn"),
-          layer: null,
-        };
-        var layer = layerFromGeoJSON(b.hidden && b.hidden.value);
-        if (layer) bindLayer(b, layer);
-        setStatus(b);
-        // Selection is driven by the explicit Edit button (and clicking the shape on
-        // the map) — the card itself isn't clickable, which read as unintuitive.
-        if (b.edit) b.edit.addEventListener("click", function () { if (!drawing) setActive(b); });
-        var clearBtn = el.querySelector(".region-clear");
-        if (clearBtn) clearBtn.addEventListener("click", function (e) {
-          e.stopPropagation();
-          setActive(b);
-          clearShape(b);
-        });
-        blocks.push(b);
-        added.push(b);
-      });
-      // Reorder to match DOM order (keeps palette colors stable by position).
-      blocks.sort(function (a, b) {
-        return els.indexOf(a.el) - els.indexOf(b.el);
-      });
-      restyle();
-      // A newly added block becomes the active one (so clicking "Add region"
-      // selects it); otherwise keep the current selection, defaulting to the last.
-      if (added.length) setActive(added[added.length - 1]);
-      else if (!active && blocks.length) setActive(blocks[blocks.length - 1]);
-    }
-
-    // A freshly drawn shape fills the region that was selected when drawing began
-    // (drawTarget) — but only if that region has no shape yet. If it already has
-    // one, or nothing was selected, the shape goes into a brand-new region, so
-    // drawing never overwrites an existing area (e.g. drawing the US inside an
-    // existing North America region adds the US rather than replacing NA).
     map.on("pm:create", function (e) {
-      var target = drawTarget;
-      if (!target || target.layer) {
-        if (typeof addBlock === "function") {
-          addBlock("region");
-          reconcile(); // registers + selects the new block synchronously
-        }
-        target = active || (blocks.length ? blocks[blocks.length - 1] : null);
-      }
-      if (!target) { map.removeLayer(e.layer); return; } // nothing to attach to
-      setActive(target);
-      attach(target, e.layer);
-      if (target.el.scrollIntoView) target.el.scrollIntoView({ block: "nearest" });
+      // Belt and braces: the draw buttons are disabled while a shape exists, but if
+      // one is somehow drawn anyway, replace rather than orphan a second polygon.
+      if (layer) map.removeLayer(layer);
+      bind(e.layer);
     });
-    // Toolbar removal: clear whichever region owned the removed layer.
     map.on("pm:remove", function (e) {
-      var b = blocks.filter(function (x) { return x.layer === e.layer; })[0];
-      if (b) { b.layer = null; serialize(b); }
+      if (e.layer === layer) clear();
     });
 
-    new MutationObserver(reconcile).observe(listEl, { childList: true });
-    reconcile();
-    fitToLayers(map, blocks.map(function (b) { return b.layer; }).filter(Boolean));
+    // Siblings first, so the edited shape sits on top of them.
+    var context = [];
+    (opts.siblings || []).forEach(function (sib) {
+      if (!sib) return;
+      var l = layerFromGeoJSON(sib.geojson);
+      if (!l) return;
+      l.setStyle(outlineStyle(sib.color));
+      if (sib.name) l.bindTooltip(String(sib.name));
+      l.addTo(map);
+      context.push(l);
+    });
+
+    var existing = layerFromGeoJSON(input.value);
+    if (existing) bind(existing);
+    else serialize();
+
+    var clearBtn = opts.clear ? document.getElementById(opts.clear) : null;
+    if (clearBtn) clearBtn.addEventListener("click", clear);
+
+    // Frame the edited shape when there is one, otherwise the siblings — a brand-new
+    // region should open looking at where its neighbors are.
+    fitToLayers(map, layer ? [layer] : context);
   };
 
   // ---- Read-only viewer ---------------------------------------------------
 
-  // regionMapView renders a location-picker map (no region outlines — those are
-  // just noise here). opts:
+  // regionMapView renders a read-only region map. opts:
+  //   regions — [{name, geojson, matched, color, primary}] drawn as non-interactive
+  //             outlines, the ones matching the previewed location brought forward.
+  //             Omit for a plain location picker (the console and serial-setup
+  //             callers do);
   //   pickURL — clicking the map navigates here with lat/lon appended so the
   //             server resolves the region def for that point (must end "?"/"&");
   //   preview — {lat, lon} of an already-picked point, shown as a marker;
@@ -267,6 +236,22 @@
     opts = opts || {};
     var map = L.map(mapId, { scrollWheelZoom: false });
     baseLayers(map);
+
+    // Region outlines go on first so the picked-location marker stays on top. They
+    // are non-interactive (see outlineStyle), so a click still reaches the map and
+    // drops a pin rather than being swallowed by a polygon.
+    var drawn = [];
+    var primary = null;
+    (opts.regions || []).forEach(function (r) {
+      if (!r) return;
+      var l = layerFromGeoJSON(r.geojson);
+      if (!l) return;
+      l.setStyle(outlineStyle(r.color, r.matched));
+      if (r.name) l.bindTooltip(String(r.name));
+      l.addTo(map);
+      drawn.push(l);
+      if (r.primary) primary = l;
+    });
     if (opts.pickURL) {
       map.on("click", function (e) {
         window.location = opts.pickURL + "lat=" + e.latlng.lat.toFixed(6) + "&lon=" + e.latlng.lng.toFixed(6);
@@ -287,6 +272,14 @@
     }
     var fit = [];
     if (opts.bounds) fit.push(opts.bounds[0], opts.bounds[1]);
+    // With no explicit bounds, open framed on the primary region — where the org
+    // actually operates — with room around it for context, rather than zooming out
+    // to contain a nationwide parent. Without a primary, frame everything drawn.
+    if (!opts.bounds && drawn.length) {
+      var rb = L.featureGroup(primary ? [primary] : drawn).getBounds();
+      if (primary) rb = rb.pad(PRIMARY_CONTEXT);
+      fit.push(rb.getSouthWest(), rb.getNorthEast());
+    }
     if (opts.preview) {
       L.circleMarker([opts.preview.lat, opts.preview.lon], {
         radius: 7, color: "#fff", weight: 2, fillColor: "#fff", fillOpacity: 0.9,
@@ -298,7 +291,7 @@
       // A zero-size box (single point — one repeater, or a preview with no
       // region box) can't be fit; center on it at a neighborhood zoom instead.
       if (b.getNorthEast().equals(b.getSouthWest())) map.setView(b.getCenter(), 11, { animate: false });
-      else map.fitBounds(b.pad(0.2), { animate: false });
+      else map.fitBounds(b, { animate: false, padding: FIT_PADDING });
     } else {
       map.setView([20, 0], 2, { animate: false });
     }
diff --git a/internal/web/static/ui.js b/internal/web/static/ui.js
index e723613..a53a138 100644
--- a/internal/web/static/ui.js
+++ b/internal/web/static/ui.js
@@ -19,6 +19,10 @@
 //   [data-risky] (checkbox)       — confirm before enabling; unchecks on cancel.
 //                                    Delegated so it works in htmx-swapped content
 //                                    (a modal fragment can't run inline script).
+//   [data-tooltip]                — show this element's title= as a styled tooltip
+//                                    on hover/focus, instead of the browser's slow
+//                                    native one. Use it on icon-only controls,
+//                                    where the icon alone doesn't say what it does.
 //
 // It also localizes timestamps: any <time data-fmt="…"> element (emitted by the
 // `ts` template func) is rewritten from its machine-readable datetime attribute
@@ -26,6 +30,18 @@
 (function () {
   "use strict";
 
+  // --- tooltips ------------------------------------------------------------
+  // Bootstrap tooltips are opt-in, so wire them once here rather than per page.
+  // Delegating through the `selector` option means a control swapped in later by
+  // htmx (a modal fragment, a re-rendered list) gets one with no re-initialization.
+  //
+  // It reads the element's title=, which stays as the no-JS fallback: without this,
+  // hovering still surfaces the native tooltip. Note data-bs-toggle is NOT the hook
+  // — an element can only carry one, and these controls already use it for modals.
+  if (window.tabler && window.tabler.Tooltip) {
+    new window.tabler.Tooltip(document.body, { selector: "[data-tooltip]" });
+  }
+
   // --- timestamp localization ---------------------------------------------
   // The server emits <time datetime="<RFC3339 UTC>" data-fmt="date|datetime|
   // time|time-seconds">UTC fallback</time>. We reformat each into the viewer's
diff --git a/internal/web/templates/org_config.html b/internal/web/templates/org_config.html
index f01d055..a728be8 100644
--- a/internal/web/templates/org_config.html
+++ b/internal/web/templates/org_config.html
@@ -8,16 +8,35 @@
   This organization hasn't defined any configuration yet.
 </div></div>
 {{else}}
+
+{{/* Section 1 — the configuration a chosen profile produces, with the profile list
+     in the right rail above the region legend (the sidebar position the rest of the
+     site uses). The main pane shows the *assembled* list — profile steps with the
+     location's region commands spliced in — which is what a repeater owner actually
+     runs; see ConfigView.AssembledLines. Main comes first in the DOM so a narrow
+     screen reads content before its picker, matching the other org pages. */}}
+{{if or .Config.Profiles .Config.PreviewActive .CanEdit}}
 <div class="row row-cards">
-  <!-- Main: selected profile's base settings + regions (only what's defined) -->
   <div class="col-lg-8">
-    {{if .Config.Profiles}}
-    <div class="card">
-      <div class="card-header"><h2 class="card-title">{{.Config.Selected}} · base settings</h2></div>
-      <div class="card-body">{{template "step-list" .Config.SelectedSteps}}</div>
+    {{if or .Config.Profiles .Config.PreviewActive}}
+    <div class="card" data-testid="config-preview">
+      <div class="card-header">
+        <h2 class="card-title">
+          {{if .Config.Profiles}}{{.Config.Selected}}{{else}}Region commands{{end}}
+          <span class="text-secondary fw-normal">{{if .Config.PreviewActive}} · at {{.PreviewLat}}, {{.PreviewLon}}{{else}} · base settings{{end}}</span>
+        </h2>
+      </div>
+      <div class="card-body">{{template "config-lines" .Config.AssembledLines}}</div>
+      {{if .Config.PreviewActive}}
+        {{if not .Config.RegionDef}}
+        <div class="card-footer text-secondary small">No regions cover this location.</div>
+        {{end}}
+      {{else if .Config.HasRegionShapes}}
+      <div class="card-footer text-secondary small">Click a spot on the map below to see the region commands a repeater there would also run.</div>
+      {{end}}
     </div>
     {{else if .CanEdit}}
-    <!-- Admin, no profiles yet: explain what a profile is and point at Add profile. -->
+    {{/* Admin, no profiles yet: explain what a profile is and point at Add profile. */}}
     <div class="card">
       <div class="card-header"><h2 class="card-title">What's a profile?</h2></div>
       <div class="card-body">
@@ -26,22 +45,7 @@
       </div>
     </div>
     {{end}}
-
-    {{if .Config.PreviewActive}}
-    <div class="card{{if .Config.Profiles}} mt-3{{end}}">
-      <div class="card-header"><h2 class="card-title">Regions</h2></div>
-      {{if .Config.RegionDef}}
-      <div class="card-body"><pre class="mb-0"><code>{{range .Config.RegionDef}}{{.}}
-{{end}}</code></pre></div>
-      {{else}}
-      <div class="card-body text-secondary">No regions cover this location.</div>
-      {{end}}
-    </div>
-    {{end}}
   </div>
-
-  <!-- Sidebar: the profile list (select one to show it on the left; admins edit in
-       place) + a click-to-preview location map -->
   <div class="col-lg-4">
     {{if or .Config.Profiles .CanEdit}}
     <div class="card">
@@ -63,12 +67,12 @@
              href="/orgs/{{$.Org.Slug}}/config?profile={{.Name | urlquery}}{{if $.PreviewLat}}&amp;lat={{$.PreviewLat}}&amp;lon={{$.PreviewLon}}{{end}}"
              {{if eq .Name $.Config.Selected}}aria-current="true"{{end}}>{{.Name}}</a>
           {{if $.CanEdit}}
-          <button type="button" class="btn btn-icon btn-ghost-secondary" data-testid="config-profile-edit"
+          <button type="button" class="btn btn-icon btn-ghost-secondary" data-testid="config-profile-edit" data-tooltip
                   title="Edit profile" aria-label="Edit profile {{.Name}}"
                   data-bs-toggle="modal" data-bs-target="#config-profile-modal"
                   hx-get="/orgs/{{$.Org.Slug}}/config/profiles/{{.ID}}/edit" hx-target="#config-profile-modal-content" hx-swap="innerHTML">{{template "icon-pencil" ""}}</button>
           <form method="post" action="/orgs/{{$.Org.Slug}}/config/profiles/{{.ID}}/delete" class="m-0" data-confirm="Delete the profile “{{.Name}}”?">
-            <button type="submit" class="btn btn-icon btn-ghost-danger" data-testid="config-profile-delete"
+            <button type="submit" class="btn btn-icon btn-ghost-danger" data-testid="config-profile-delete" data-tooltip
                     title="Delete profile" aria-label="Delete profile {{.Name}}">{{template "icon-trash" ""}}</button>
           </form>
           {{end}}
@@ -78,51 +82,156 @@
       {{else}}
       <div class="card-body text-secondary">No profiles yet.</div>
       {{end}}
-      {{if or .Config.Profiles .Config.HasRegions}}
-      <div class="card-footer text-secondary small">
-        {{if .Config.Profiles}}Select a profile to see its base settings.{{end}}{{if .Config.HasRegions}} A repeater's regions are assigned separately, by location.{{end}}
-      </div>
-      {{end}}
-    </div>
-    {{end}}
-
-    {{if .Config.HasRegionShapes}}
-    <div class="card{{if or .Config.Profiles .CanEdit}} mt-3{{end}}">
-      <div class="card-header"><h2 class="card-title">Preview a location</h2></div>
-      <div class="card-body p-2">
-        <link rel="stylesheet" href="{{ asset "/static/leaflet.css" }}">
-        <div id="region-map" style="height:240px" role="region" aria-label="Click the map to preview a repeater's region config"></div>
-        <script src="{{ asset "/static/leaflet.js" }}"></script>
-        <script src="{{ asset "/static/regionmap.js" }}"></script>
-        <script nonce="{{.Nonce}}">
-          regionMapView('region-map', {
-            pickURL: '/orgs/{{.Org.Slug}}/config?{{if .Config.Profiles}}profile={{.Config.Selected | urlquery}}&{{end}}',
-            {{if .Config.PreviewActive}}preview: {lat: {{.PreviewLat}}, lon: {{.PreviewLon}}},{{end}}
-            {{if .Config.MapBounds}}bounds: [[{{index .Config.MapBounds 0}}, {{index .Config.MapBounds 1}}], [{{index .Config.MapBounds 2}}, {{index .Config.MapBounds 3}}]]{{end}}
-          });
-        </script>
-        {{if .Config.PreviewActive}}
-        <div class="text-secondary small mt-2 text-center">{{template "icon-map-pin" "me-1"}}<span class="font-monospace">{{.PreviewLat}}, {{.PreviewLon}}</span></div>
-        {{end}}
-      </div>
     </div>
     {{end}}
   </div>
+
 </div>
+{{end}}
+
+{{/* Section 2 — Regions: the map is the view of them, and the list beside it is the
+     map's legend (swatch + hierarchy by indentation). Everyone sees it; only admins
+     get the controls. Clicking the map picks a location, which is what drives the
+     assembled preview above. */}}
+{{if or .Config.Regions .CanEdit}}
+<div class="card mt-3" data-testid="config-regions">
+  <div class="card-header">
+    <div>
+      <h2 class="card-title">Regions</h2>
+      <div class="text-secondary small">Named areas drawn on a map. A repeater joins every region whose area contains it.</div>
+    </div>
+    {{if .CanEdit}}
+    <div class="card-actions">
+      <button type="button" class="btn btn-sm btn-primary" data-testid="config-region-add"
+              data-bs-toggle="modal" data-bs-target="#config-region-modal"
+              hx-get="/orgs/{{.Org.Slug}}/config/regions/new" hx-target="#config-region-modal-content" hx-swap="innerHTML">{{template "icon-plus" "me-1"}}Add region</button>
+    </div>
+    {{end}}
+  </div>
+  <div class="card-body p-0">
+    <div class="row g-0">
+      <div class="col-lg-8">
+        {{if .Config.HasRegionShapes}}
+        <link rel="stylesheet" href="{{ asset "/static/leaflet.css" }}">
+        <div id="region-map" style="height:520px" role="region"
+             aria-label="Map of this organization’s regions — click to preview a location"></div>
+        <script src="{{ asset "/static/leaflet.js" }}"></script>
+        <script src="{{ asset "/static/regionmap.js" }}"></script>
+        {{/* Region names and shapes are user data, interpolated in a JS context so
+             html/template JSON-encodes and escapes them. */}}
+        <script nonce="{{.Nonce}}">
+          regionMapView('region-map', {
+            regions: {{.Config.MapRegions}},
+            pickURL: '/orgs/{{.Org.Slug}}/config?{{if .Config.Profiles}}profile={{.Config.Selected | urlquery}}&{{end}}'{{if .Config.PreviewActive}},
+            preview: {lat: {{.PreviewLat}}, lon: {{.PreviewLon}}}{{end}}
+          });
+        </script>
+        {{else}}
+        <div class="p-4 text-secondary" data-testid="config-regions-noshapes">
+          {{if .Config.Regions}}
+          No region has an area drawn yet, so there is nothing to show on a map.
+          {{if .CanEdit}}Use the area button on a region to outline where it applies.{{end}}
+          {{else}}
+          Regions apply settings by location. Add one, draw where it applies, and a
+          repeater there picks it up automatically.
+          {{end}}
+        </div>
+        {{end}}
+      </div>
+      <div class="col-lg-4 border-start">
+        <div class="list-group list-group-flush" style="max-height:520px; overflow-y:auto">
+          {{if .CanEdit}}
+          {{/* The root (*) isn't a region row — it lives on the org — so it has no
+               swatch and its only setting is flood policy, saved on its own. */}}
+          <div class="list-group-item d-flex align-items-center gap-2" data-testid="config-region-root">
+            <div class="flex-fill" style="min-width:0">
+              <div class="fw-bold">Root <span class="text-secondary fw-normal">· <code>*</code> · everywhere</span></div>
+              <div class="text-secondary small">Deny flood to scope flooding to your defined regions.</div>
+            </div>
+            <form method="post" action="/orgs/{{.Org.Slug}}/config/root-flood" class="m-0 flex-shrink-0">
+              {{/* No hidden shadow input: an unchecked checkbox simply isn't submitted,
+                   which the handler reads as deny. */}}
+              <label class="form-check form-switch m-0 text-nowrap">
+                <input class="form-check-input" type="checkbox" name="root_allow_flood" value="1"
+                       {{if .Config.RootAllowFlood}}checked{{end}} data-autosubmit
+                       aria-label="Allow flood at the root region">
+                <span class="form-check-label">Allow flood</span>
+              </label>
+            </form>
+          </div>
+          {{end}}
+          {{range .Config.Regions}}
+          <div class="list-group-item d-flex align-items-center gap-2" data-testid="config-region-row">
+            {{/* Align to the top, not the middle: the swatch labels the region's name
+                 on the first line, and centering would float it down beside the token. */}}
+            <div class="flex-fill d-flex align-items-start gap-2" style="min-width:0; padding-left:{{.Depth}}rem">
+              {{if .HasShape}}
+              <span class="flex-shrink-0" aria-hidden="true"
+                    style="width:.75rem; height:.75rem; margin-top:.4rem; border-radius:2px; background-color:{{.Color}}"></span>
+              {{else}}
+              <span class="flex-shrink-0 text-warning" title="No area drawn yet">{{template "icon-alert" ""}}</span>
+              {{end}}
+              {{/* Name, then token, then status — each on its own line. A token is an
+                   identifier, so it never wraps mid-string. */}}
+              <div style="min-width:0">
+                <div>{{.DisplayName}}</div>
+                <div><span class="text-secondary text-nowrap"><code>{{.Token}}</code></span></div>
+                {{if not .HasShape}}
+                <div class="text-warning small" data-testid="config-region-draft">Needs an area</div>
+                {{else if .Matches}}
+                <div class="text-green small" data-testid="config-region-match">Applies here</div>
+                {{else if not .AllowFlood}}
+                <div class="text-secondary small">Flood denied</div>
+                {{end}}
+              </div>
+            </div>
+            {{if $.CanEdit}}
+            <a class="btn btn-icon btn-ghost-secondary flex-shrink-0" data-testid="config-region-area" data-tooltip
+               title="{{if .HasShape}}Edit area{{else}}Draw area{{end}}"
+               aria-label="{{if .HasShape}}Edit{{else}}Draw{{end}} area for {{.DisplayName}}"
+               href="/orgs/{{$.Org.Slug}}/config/regions/{{.ID}}/area">{{template "icon-map-pin" ""}}</a>
+            <button type="button" class="btn btn-icon btn-ghost-secondary flex-shrink-0" data-testid="config-region-edit" data-tooltip
+                    title="Edit region" aria-label="Edit region {{.DisplayName}}"
+                    data-bs-toggle="modal" data-bs-target="#config-region-modal"
+                    hx-get="/orgs/{{$.Org.Slug}}/config/regions/{{.ID}}/edit" hx-target="#config-region-modal-content" hx-swap="innerHTML">{{template "icon-pencil" ""}}</button>
+            <form method="post" action="/orgs/{{$.Org.Slug}}/config/regions/{{.ID}}/delete" class="m-0 flex-shrink-0" data-confirm="Delete the region “{{.DisplayName}}”?">
+              <button type="submit" class="btn btn-icon btn-ghost-danger" data-testid="config-region-delete" data-tooltip
+                      title="Delete region" aria-label="Delete region {{.DisplayName}}">{{template "icon-trash" ""}}</button>
+            </form>
+            {{end}}
+          </div>
+          {{end}}
+          {{if not .Config.Regions}}
+          <div class="list-group-item text-secondary">No regions yet.</div>
+          {{end}}
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+{{end}}
 
 {{if .CanEdit}}
-<!-- Admin profile editor; the Add/Edit buttons load their fragment here via htmx. -->
+<!-- Admin editors; the Add/Edit buttons load their fragment here via htmx. A region's
+     area is not edited here — it needs a full-width map, so it has its own page. -->
 <div class="modal modal-blur fade" id="config-profile-modal" tabindex="-1" aria-hidden="true">
   <div class="modal-dialog modal-dialog-centered modal-dialog-scrollable modal-lg" role="document">
     <div class="modal-content" id="config-profile-modal-content"></div>
   </div>
 </div>
+<div class="modal modal-blur fade" id="config-region-modal" tabindex="-1" aria-hidden="true">
+  <div class="modal-dialog modal-dialog-centered modal-dialog-scrollable" role="document">
+    <div class="modal-content" id="config-region-modal-content"></div>
+  </div>
+</div>
 {{end}}
 {{end}}
 {{end}}
 
-{{/* step-list renders a sequence of ConfigStep as a copy-pasteable block. */}}
-{{define "step-list"}}
-{{if .}}<pre class="mb-0"><code>{{range .}}{{if .IsComment}}# {{.Comment}}{{else}}{{.CommandLine}}{{end}}
+{{/* config-lines renders assembled ConfigLines as one copy-pasteable block. Region
+     lines are tinted so it reads which came from the location rather than the
+     profile, matching the highlighted polygons on the map. */}}
+{{define "config-lines"}}
+{{if .}}<pre class="mb-0" data-testid="config-commands"><code>{{range .}}{{if .IsMarker}}<span class="text-secondary">&#8230; click a spot on the map below to fill in the region commands &#8230;</span>{{else if .IsComment}}# {{.Text}}{{else if .FromRegion}}<span class="text-azure" data-testid="config-region-line">{{.Text}}</span>{{else}}{{.Text}}{{end}}
 {{end}}</code></pre>{{else}}<div class="text-secondary">No steps.</div>{{end}}
 {{end}}
diff --git a/internal/web/templates/org_tabs.html b/internal/web/templates/org_tabs.html
index b6f532a..30bc160 100644
--- a/internal/web/templates/org_tabs.html
+++ b/internal/web/templates/org_tabs.html
@@ -19,7 +19,6 @@ host (anonymous). */}}
     <div class="dropdown">
       <button class="btn dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false" data-testid="org-actions">Actions</button>
       <div class="dropdown-menu dropdown-menu-end">
-        {{if .Nav.IsAdmin}}<a class="dropdown-item" href="/orgs/{{.Nav.Slug}}/config/edit">{{template "icon-settings" "dropdown-item-icon"}}Edit configuration</a>{{end}}
         <a class="dropdown-item" href="{{.RootURL}}/orgs/{{.Nav.Slug}}">{{template "icon-world" "dropdown-item-icon"}}View public page</a>
         <div class="dropdown-divider"></div>
         <form method="post" action="/orgs/{{.Nav.Slug}}/leave" class="m-0" data-confirm="Leave this organization?">