diff --git a/doc/shaper_usage.md b/doc/shaper_usage.md
index 8e83bfb..ad87634 100644
--- a/doc/shaper_usage.md
+++ b/doc/shaper_usage.md
@@ -573,13 +573,11 @@ With `LineHeightScale = 1.2`: `visualGap ≈ 0.2 * lineHeight` (20% padding)
 
 ## 9.5 Drawing Elements Inside the Visible Window
 
-When drawing elements like the BottomBar, the region Y computed from `screenHeight` may be outside the visible window area. This happens because `app.ConfigEvent` reports the **physical pixel size** of the window, which can be much larger than the requested DP size (e.g., macOS reports 1560×3376 pixels when we requested 390×844 DP).
+When drawing elements like the BottomBar, the region coordinates computed from `screenHeight` may be outside the visible window area. This happens because `app.ConfigEvent` reports the **physical pixel size** of the window, which can be much larger than the requested DP size (e.g., macOS reports 1560×3376 pixels when we requested 390×844 DP).
 
-**The fix**: Use `gtx.Constraints.Max.Y` (in physical pixels) to clamp the draw position to the visible area:
+**Y positioning**: Use `gtx.Constraints.Max.Y` (in physical pixels) to clamp the draw position to the visible area:
 
 ```go
-// gtx.Constraints.Max.Y is in physical pixels.
-// Convert to DP using gtx.Metric.PxPerDp.
 scale := gtx.Metric.PxPerDp
 bottomBarHeightPx := int(24 * scale)
 marginPx := int(10 * scale)
@@ -587,7 +585,27 @@ drawYPx := gtx.Constraints.Max.Y - bottomBarHeightPx - marginPx
 drawY := unit.Dp(float64(drawYPx) / float64(scale))
 ```
 
-**Key insight**: `gtx.Constraints.Max.X/Y` are in **physical pixels**, not DP. Always convert using `gtx.Metric.PxPerDp` when mixing pixels and DP.
+**X positioning**: `gtx.Constraints` are modified by previous widgets (e.g., `Min.X` changes after StatusBar draws). Use the element's own region for X positioning, clamped to `gtx.Constraints.Max.X`:
+
+```go
+regXPx := int(float32(reg.X) * scale)
+windowW := gtx.Constraints.Max.X
+rightXPx := regXPx + int(float32(reg.W)*scale)
+if rightXPx > windowW {
+    rightXPx = windowW
+}
+barW := rightXPx - regXPx
+// Now use regXPx and barW for all X positions
+cursorXPx := regXPx + int(8*scale)
+byteXPx := regXPx + barW/2 - int(60*scale)
+wordWrapXPx := regXPx + barW - int(80*scale)
+```
+
+**Key insights**:
+- `gtx.Constraints.Max.Y` is in **physical pixels** — use for Y positioning
+- `gtx.Constraints.Min.X` is **modified by previous widgets** — don't use for X positioning
+- Always convert DP to pixels using `gtx.Metric.PxPerDp` when mixing with pixel values
+- Always clamp right edge to `gtx.Constraints.Max.X`
 
 ## 10. Summary