diff --git a/plugin-designs/my-upg-100-list/upg-100-mfe.vue b/plugin-designs/my-upg-100-list/upg-100-mfe.vue
index 2471d658d..93fa8e75e 100644
--- a/plugin-designs/my-upg-100-list/upg-100-mfe.vue
+++ b/plugin-designs/my-upg-100-list/upg-100-mfe.vue
@@ -36,6 +36,7 @@
 import { ref, computed, inject, onMounted, onBeforeUnmount } from 'vue'
 import { useOptionalT } from '@map/composables/useOptionalT.js'
 import { buildPaneColumn, PANE_GRID_STYLES } from '@map/layouts/pane-wrapper/pane-wrapper.js'
+import { urlOwnerOf, ownAddress } from '@map/composables/useViewAddress.js'
 import { useShadowStyles } from '@map/composables/useShadowStyles.js'
 import ViewSelect from '@map/components/ViewSelect.vue'
 import ShareButton from '@map/components/map-controls/ShareButton.vue'
@@ -71,6 +72,8 @@ import MapInfoButton from '@map/components/map-controls/MapInfoButton.vue'
 const t = useOptionalT('')
 
 const cfg     = inject('profileConfig', ref(null))
+// P2: the pane in view is part of the address (?pane=), written by whoever owns this page (urlOwnerOf).
+const owner   = () => urlOwnerOf(cfg.value)
 const tk      = inject('mapboxToken', ref(''))
 const uiStore = inject('uiStore', null)
 const isDark  = computed(() => !!uiStore?.isDark)
@@ -150,6 +153,7 @@ const view = computed({
 })
 let column   = null
 let offScroll = null
+let offOwn    = null   // P2: ownAddress's undo, called on unmount
 // The mounted custom element per pane id. Kept because a cross-pane action has to reach the
 // TARGET PANE'S ELEMENT: upg-100-list listens for 'doxa:select-zone' on itself rather than on
 // window, precisely so two embeds on one page do not cross-talk — which means the shell has to
@@ -300,8 +304,9 @@ function onShowOnMap(e) {
 
 onMounted(() => {
   if (!stage.value) return
-  column = buildPaneColumn(spec.value, { host: stage.value })
+  column = buildPaneColumn(spec.value, { host: stage.value, address: { owner } })
   if (!column) return
+  offOwn = ownAddress(stage.value, owner)
   for (const pane of column.panes) {
     if (!pane.config) continue
     const el = paneElement(pane)
@@ -330,6 +335,8 @@ onMounted(() => {
 onBeforeUnmount(() => {
   window.removeEventListener('doxa-upg-100-list:show-on-map', onShowOnMap)
   offScroll?.()
+  offOwn?.()
+  offOwn = null
   column?.destroy()
   column = null
   // Drop the element references with the column that owned them — holding a detached custom