diff --git a/core/src/ui/active.rs b/core/src/ui/active.rs
index b5f04a9..9c76e17 100644
--- a/core/src/ui/active.rs
+++ b/core/src/ui/active.rs
@@ -18,6 +18,9 @@ pub struct ActiveData {
     /// The original frame in its parent widget's coordinates. Recomposition
     /// and pixel-length evaluation both follow this chain.
     pub given_region: UiRegion,
+    /// The frame it was first asked in, in the same coordinates: the offer's
+    /// frame, which its parent's placing draw may since have narrowed.
+    pub offer_region: UiRegion,
     /// The lengths of the box its parent first asked about it in, as
     /// lengths of the box the parent was itself offered. Any later box it
     /// was given was decided knowing its answer, so this is the question
diff --git a/core/src/ui/painter.rs b/core/src/ui/painter.rs
index c6b06a7..0b7f755 100644
--- a/core/src/ui/painter.rs
+++ b/core/src/ui/painter.rs
@@ -271,6 +271,14 @@ impl<'a> Painter<'a> {
                 .get(&id.id())
                 .map_or(given_len, |a| a.offer_len),
         };
+        let offer_region = match first_ask {
+            true => local,
+            false => self
+                .state
+                .active
+                .get(&id.id())
+                .map_or(local, |a| a.offer_region),
+        };
         let offer_placement = if first_ask {
             placement
         } else {
@@ -295,6 +303,7 @@ impl<'a> Painter<'a> {
                 region_node,
                 mask: self.mask,
                 given_region: local,
+                offer_region,
                 offer_len,
                 offer_placement,
                 px,
@@ -427,6 +436,7 @@ impl<'a> Painter<'a> {
             self.offered.push(child.id());
             let active = self.state.active.get_mut(&child.id()).unwrap();
             active.offer_len = local.size();
+            active.offer_region = local;
             active.offer_placement = placement;
         }
         let placement = UiRegion {
diff --git a/core/src/ui/render_state.rs b/core/src/ui/render_state.rs
index 00359e1..3574bb8 100644
--- a/core/src/ui/render_state.rs
+++ b/core/src/ui/render_state.rs
@@ -24,6 +24,8 @@ pub(super) struct DrawInfo {
     pub given_region: UiRegion,
     /// The original offer's lengths relative to the parent's own offer.
     pub offer_len: UiVec2,
+    /// The offer's frame in the parent widget's coordinates.
+    pub offer_region: UiRegion,
     pub offer_placement: [Option<UiSpan>; 2],
     /// This ask's box in pixels, and the offer's: one multiply from the
     /// parent's own, which is where every pixel length in layout comes from.
@@ -134,6 +136,7 @@ impl UiRenderState {
             region_node: false,
             mask: MaskIdx::NONE,
             given_region: region,
+            offer_region: region,
             offer_len: UiVec2::FULL_SIZE,
             offer_placement: [None; 2],
             px,
@@ -274,6 +277,7 @@ impl UiRenderState {
         // same question again from these.
         active.region = region;
         active.given_region = info.given_region;
+        active.offer_region = info.offer_region;
         active.offer_len = info.offer_len;
         if info.placement == info.offer_placement && info.px == info.offered_px {
             active.answer = Some(answer);
@@ -478,6 +482,7 @@ impl UiRenderState {
                         region_node: false,
                         mask,
                         given_region: UiRegion::FULL,
+                        offer_region: UiRegion::FULL,
                         offer_len: UiVec2::FULL_SIZE,
                         offer_placement: [None; 2],
                         px,
@@ -495,6 +500,7 @@ impl UiRenderState {
             region,
             placement,
             given_region: info.given_region,
+            offer_region: info.offer_region,
             offer_len: info.offer_len,
             offer_placement: info.offer_placement,
             // Whoever asked writes the answer, if this was the asking.
@@ -724,6 +730,7 @@ impl UiRenderState {
         let active = self.active.get_mut(&id).unwrap();
         active.region = region;
         active.given_region = info.given_region;
+        active.offer_region = info.offer_region;
         active.offer_len = info.offer_len;
         #[cfg(feature = "layout-diagnostics")]
         {
@@ -795,6 +802,7 @@ impl UiRenderState {
                 region_node: active.move_idx != active.parent_move,
                 mask,
                 given_region: child_local,
+                offer_region: active.offer_region,
                 offer_len: active.offer_len,
                 offer_placement: active.offer_placement,
                 px: child_local.size().to_px(info.px),
@@ -934,6 +942,7 @@ impl UiRenderState {
                 region: UiRegion::FULL,
                 placement: UiRegion::FULL,
                 given_region: UiRegion::FULL,
+                offer_region: UiRegion::FULL,
                 offer_len: UiVec2::FULL_SIZE,
                 offer_placement: [None; 2],
                 answer: None,
@@ -1170,16 +1179,6 @@ impl UiRenderState {
             return true;
         };
         let (given_px, offered_px) = self.asked_px(id);
-        // Asked again in the box its parent gave it, which is the question
-        // its parent asked only while that box is as long as the offer. Any
-        // other box is a different question, so the parent asks it, with the
-        // mark left on. Lengths and not whole boxes: what a drawing depends
-        // on is its lengths, so the same lengths elsewhere is one question.
-        if given_px != offered_px {
-            self.mark(id, rsc.widgets_mut());
-            self.mark(parent, rsc.widgets_mut());
-            return false;
-        }
         let info = DrawInfo {
             layer: active.layer,
             parent: active.parent,
@@ -1188,6 +1187,7 @@ impl UiRenderState {
             region_node: rsc.widgets().is_region_node(id),
             mask: active.parent_mask,
             given_region: active.given_region,
+            offer_region: active.offer_region,
             offer_len: active.offer_len,
             offer_placement: active.offer_placement,
             px: given_px,
@@ -1202,14 +1202,33 @@ impl UiRenderState {
         diag::bump(Counter::LocalRedraws);
 
         let old = self.remove(id, false, rsc);
-        // Refresh the original measurement before restoring the assigned slot.
-        // Its lengths may differ even though the fraction reference is unchanged.
+        // Asked again where its parent asked: the offer's frame, composed
+        // where the given one is, at the offer's lengths and placement. That
+        // is the question its answer came from, whatever box the parent then
+        // chose from the answer -- which is often a different frame, since a
+        // span hands its children its own placement across itself. The
+        // parent draws in its own frame, or in `FULL` where it is a region
+        // node.
+        let parent_frame = match self.active.get(&parent) {
+            Some(p) if p.move_idx == p.parent_move => p.region,
+            _ => UiRegion::FULL,
+        };
+        let offer_frame = match info.offer_region == UiRegion::FULL {
+            true => parent_frame,
+            false => info.offer_region.within(&parent_frame),
+        };
         let offered = DrawInfo {
             placement: info.offer_placement,
+            given_region: info.offer_region,
+            px: offered_px,
             ..info
         };
-        let answer = self.draw_inner(id, given, offered, old, false, rsc);
-        if info.placement != offered.placement {
+        // Where the given differs from the offer, the first draw is only the
+        // measurement and the second puts the drawing where the parent did.
+        let placed_apart =
+            info.placement != offered.placement || info.px != offered.px || given != offer_frame;
+        let answer = self.draw_inner(id, offer_frame, offered, old, placed_apart, rsc);
+        if placed_apart {
             self.draw_inner(id, given, info, None, false, rsc);
         }
         let active = self.active.get_mut(&id).unwrap();