diff --git a/internal/ui/render.go b/internal/ui/render.go
index 5c4ba0f..b4ed8dd 100644
--- a/internal/ui/render.go
+++ b/internal/ui/render.go
@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"fmt"
 	"image"
 	"image/color"
 
@@ -29,6 +30,7 @@ func New(th Theme, shp *text.Shaper) *Renderer {
 // Draw iterates elements and draws each in slice order (back-to-front).
 func (r *Renderer) Draw(gtx layout.Context, elems []Element) {
 	for _, e := range elems {
+		fmt.Printf("[DEBUG Draw] elem type=%T visible=%v\n", e, e.Visible())
 		if !e.Visible() {
 			continue
 		}
@@ -146,21 +148,35 @@ func (r *Renderer) drawStatusBar(gtx layout.Context, sb StatusBar) {
 func (r *Renderer) drawBottomBar(gtx layout.Context, bb BottomBar) {
 	reg := bb.Region()
 
-	// BottomBar text at reg.Y (top of bar), using drawText for consistent rendering.
-	// The BottomBar region is at the bottom of the screen with 10DP margin.
-	bottomY := reg.Y
+	fmt.Printf("[DEBUG drawBottomBar] reg=(%d, %d, %d, %d)\n", gtx.Dp(reg.X), gtx.Dp(reg.Y), gtx.Dp(reg.W), gtx.Dp(reg.H))
+	fmt.Printf("[DEBUG drawBottomBar] constraints=(%d, %d, %d, %d)\n",
+		gtx.Constraints.Min.X, gtx.Constraints.Min.Y,
+		gtx.Constraints.Max.X, gtx.Constraints.Max.Y)
+
+	// Clamp BottomBar Y to visible window area.
+	// The region Y may be outside the visible area (e.g. 3308 DP when window is 1688px).
+	// 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)
+	drawYPx := gtx.Constraints.Max.Y - bottomBarHeightPx - marginPx
+	drawY := unit.Dp(float64(drawYPx) / float64(scale))
+	fmt.Printf("[DEBUG drawBottomBar] drawY=%d (clamped from %d)\n", gtx.Dp(drawY), gtx.Dp(reg.Y))
 
 	// Left: Cursor position
 	cursorX := reg.X + unit.Dp(8)
-	r.drawText(gtx, r.shp, bb.CursorPos, r.theme.FontSize, cursorX, bottomY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	fmt.Printf("[DEBUG drawBottomBar] cursor=(%d, %d) text=%q\n", gtx.Dp(cursorX), gtx.Dp(drawY), bb.CursorPos)
+	r.drawText(gtx, r.shp, bb.CursorPos, r.theme.FontSize, cursorX, drawY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 
 	// Center: Byte position
 	byteX := reg.X + reg.W/2 - unit.Dp(60) // approximate center
-	r.drawText(gtx, r.shp, bb.BytePos, r.theme.FontSize, byteX, bottomY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	fmt.Printf("[DEBUG drawBottomBar] byte=(%d, %d) text=%q\n", gtx.Dp(byteX), gtx.Dp(drawY), bb.BytePos)
+	r.drawText(gtx, r.shp, bb.BytePos, r.theme.FontSize, byteX, drawY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 
 	// Right: Word wrap button
 	wordWrapX := reg.X + reg.W - unit.Dp(80)
-	r.drawText(gtx, r.shp, "W:"+boolToString(bb.WordWrap), r.theme.FontSize, wordWrapX, bottomY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
+	fmt.Printf("[DEBUG drawBottomBar] wordwrap=(%d, %d) text=%q\n", gtx.Dp(wordWrapX), gtx.Dp(drawY), "W:"+boolToString(bb.WordWrap))
+	r.drawText(gtx, r.shp, "W:"+boolToString(bb.WordWrap), r.theme.FontSize, wordWrapX, drawY, color.NRGBA{R: 0, G: 0, B: 0, A: 255})
 }
 
 func (r *Renderer) drawButton(gtx layout.Context, btn Button) {