diff --git a/src/widget/text/mod.rs b/src/widget/text/mod.rs
index 30de829..08208d0 100644
--- a/src/widget/text/mod.rs
+++ b/src/widget/text/mod.rs
@@ -89,10 +89,17 @@ impl TextView {
         (region, size)
     }
 
-    /// Wrapping reads the width it is offered, so a wider box reshapes it; a
-    /// taller one never does.
+    /// Wrapping reads the width it is offered, so a wider box reshapes it and
+    /// a taller one does not. Alignment matters too, and separately: glyphs
+    /// anchored to the start of an axis stay put when that extent changes,
+    /// but centred or end-aligned ones move even though the shaping stands.
     pub fn size_dependence(&self, axis: Axis) -> SizeDependence {
-        match axis == Axis::X && self.attrs.wrap {
+        let reshapes = axis == Axis::X && self.attrs.wrap;
+        let anchored = match axis {
+            Axis::X => self.align.x,
+            Axis::Y => self.align.y,
+        } == AxisAlign::Neg;
+        match reshapes || !anchored {
             true => SizeDependence::External,
             false => SizeDependence::Internal,
         }