diff --git a/library/components/poster/PosterWall.vue b/library/components/poster/PosterWall.vue
index 60f8fbe35..3d59c76bf 100644
--- a/library/components/poster/PosterWall.vue
+++ b/library/components/poster/PosterWall.vue
@@ -112,6 +112,9 @@ const props = defineProps({
   // async (item, format) => a map SHEET generated now (packet/posterSheets.js); tried first for the poster
   // print and the packet's page 1. usePosterPrints' sheet.
   sheet: { type: Function, default: null },
+  // (item, which) => void: start the loads a print of this item will need, called when the reader OPENS a print
+  // chooser (the Prayer List packets, the Card Deck sizes): an intent moment before the tap, so the print skips them.
+  prewarm: { type: Function, default: null },
   // Card stock for the deck print, when this wall offers one. See card-render.js
   // STOCK — both orientations are available. This is the DEFAULT selection.
   cardStock: { type: String, default: 'poker' },
@@ -782,6 +785,10 @@ const deckKey = (id, which) => `${id}:${which}`
 function toggleDeck(id, ev, which = 'deck') {
   const key = deckKey(id, which)
   deckOpenFor.value = deckOpenFor.value === key ? null : key
+  if (deckOpenFor.value === key && props.prewarm) {
+    const item = (props.items || []).find((x) => x && x.id === id)
+    if (item) { try { props.prewarm(item, which) } catch (_) { /* a warm-up is only a head start */ } }
+  }
   // Tell the size row how far down to start: the print row's REAL height, which is
   // one line in en and two in the long-label locales. Walking up from the clicked
   // button to its own .pfs keeps this correct per card rather than per wall.
diff --git a/plugin-designs/country-posters/country-poster-wall.vue b/plugin-designs/country-posters/country-poster-wall.vue
index 86f277a41..93c8b0fcb 100644
--- a/plugin-designs/country-posters/country-poster-wall.vue
+++ b/plugin-designs/country-posters/country-poster-wall.vue
@@ -191,6 +191,16 @@ const countryOnlySheet = (card, format, opts) => sheetForRecord(byId.get(card.id
 const stateSheet = makeIndiaStateSheet({
   records: recordsFor, assetsBase: () => assetsBase.value, states: () => indiaStates.value, region: INDIA_REGION,
 })
+// ★ WARM ON INTENT: opening a card's Prayer List or Card Deck chooser starts that card's people groups (the cached
+// provider the print then reads) and, for the packet, whose page 1 is the country sheet, the sheet's boundaries and
+// engine (warmSheet), so the print after the choice skips those loads. Never on browsing alone, never for a withheld card.
+function prewarmPrint(card, which) {
+  if (!card || card.noGroups || rowsWithheld(card) || posterWithheld(card)) return
+  const rows = card.indiaState ? (card.slugs && card.slugs.length ? recordsFor({ type: 'pg_slugs', values: card.slugs }) : null)
+    : (card.iso3 ? recordsFor({ type: 'country', values: [card.iso3] }) : null)
+  if (rows && rows.catch) rows.catch(() => {})
+  if (which === 'packet') import('@map/packet/posterSheets.js').then((m) => m.warmSheet && m.warmSheet(assetsBase.value)).catch(() => {})
+}
 const countrySheet = (card, format, opts) => (card.indiaState ? stateSheet(card, format, opts) : countryOnlySheet(card, format, opts))
 // The name table the generated sheet was labelled from, so a packet in another language relabels page 1's
 // country names (the same seam the UPG-100 wall passes).
@@ -274,6 +284,7 @@ const soonMessage = computed(() => t('messages.countryWallSoon'))
     :records="countryRecords"
     :card-stocks="true"
     :sheet="countrySheet"
+    :prewarm="prewarmPrint"
     :iso3-names="iso3Names"
     :map-image="countryMap"
     :collapsible="!filtered"