diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..c866d2c
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,8 @@
+{
+    "chat.tools.terminal.autoApprove": {
+        "/^bash \\./SetupBuildEnvironment\\.sh --build$/": {
+            "approve": true,
+            "matchCommandLine": true
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 6a0390f..ec00983 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -11,8 +11,8 @@ android {
         applicationId = "com.kawomi.githugandroid"
         minSdk = 26
         targetSdk = 34
-        versionCode = 40
-        versionName = "0.1.39"
+        versionCode = 42
+        versionName = "0.1.41"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
diff --git a/app/src/main/java/com/kawomi/githugandroid/PaneLayoutLogic.kt b/app/src/main/java/com/kawomi/githugandroid/PaneLayoutLogic.kt
index 4155f38..69a6fac 100644
--- a/app/src/main/java/com/kawomi/githugandroid/PaneLayoutLogic.kt
+++ b/app/src/main/java/com/kawomi/githugandroid/PaneLayoutLogic.kt
@@ -18,25 +18,51 @@ fun movePane(layout: PaneLayout, paneId: PaneId, delta: Int): PaneLayout {
 fun resizePanes(
     layout: PaneLayout,
     upper: PaneId,
-    lower: PaneId,
+    lower: PaneId?,
     dragFraction: Float,
 ): PaneLayout {
-    if (upper in layout.collapsed || lower in layout.collapsed) return layout
+    if (upper in layout.collapsed) return layout
+    if (lower != null && lower in layout.collapsed) return layout
 
     val minWeight = 0.6f
-    val upperWeight = layout.weights[upper] ?: 1f
-    val lowerWeight = layout.weights[lower] ?: 1f
     val scaledDelta = dragFraction.coerceIn(-0.75f, 0.75f)
 
-    val newUpper = (upperWeight + scaledDelta).coerceAtLeast(minWeight)
-    val newLower = (lowerWeight - scaledDelta).coerceAtLeast(minWeight)
+    if (lower != null) {
+        // Resize between two panes
+        val upperWeight = layout.weights[upper] ?: 1f
+        val lowerWeight = layout.weights[lower] ?: 1f
 
-    return layout.copy(
-        weights = layout.weights + mapOf(
-            upper to newUpper,
-            lower to newLower,
+        val newUpper = (upperWeight + scaledDelta).coerceAtLeast(minWeight)
+        val newLower = (lowerWeight - scaledDelta).coerceAtLeast(minWeight)
+
+        return layout.copy(
+            weights = layout.weights + mapOf(
+                upper to newUpper,
+                lower to newLower,
+            )
         )
-    )
+    } else {
+        // Resize the upper pane against the bottom (spacer)
+        val upperWeight = layout.weights[upper] ?: 1f
+        val newUpper = (upperWeight + scaledDelta).coerceAtLeast(minWeight)
+
+        // To keep the total weight sum the same, scale other weights proportionally
+        val otherPanes = layout.order.filter { it != upper && it !in layout.collapsed }
+        if (otherPanes.isEmpty()) return layout
+
+        val currentTotalOther = otherPanes.sumOf { (layout.weights[it] ?: 1f).toDouble() }.toFloat()
+        val delta = newUpper - upperWeight
+        val scale = if (currentTotalOther > 0) (currentTotalOther - delta) / currentTotalOther else 1f
+
+        val newWeights = layout.weights.toMutableMap()
+        newWeights[upper] = newUpper
+        otherPanes.forEach { pane ->
+            val current = layout.weights[pane] ?: 1f
+            newWeights[pane] = (current * scale).coerceAtLeast(minWeight)
+        }
+
+        return layout.copy(weights = newWeights)
+    }
 }
 
 fun recommendedPaneHeights(
@@ -76,7 +102,7 @@ fun recommendedWorkspaceHeight(
     paneLayout: PaneLayout,
     recommendedHeights: Map<PaneId, Int>,
 ): Dp {
-    val dividerHeight = 18 * (paneLayout.order.size - 1)
+    val dividerHeight = 18 * paneLayout.order.size
     val collapsedPaneHeight = 44 * paneLayout.collapsed.size
     val expandedHeight = paneLayout.order
         .filterNot { it in paneLayout.collapsed }
diff --git a/app/src/main/java/com/kawomi/githugandroid/Panes.kt b/app/src/main/java/com/kawomi/githugandroid/Panes.kt
index 37c1883..41cf255 100644
--- a/app/src/main/java/com/kawomi/githugandroid/Panes.kt
+++ b/app/src/main/java/com/kawomi/githugandroid/Panes.kt
@@ -33,7 +33,7 @@ fun PaneWorkspace(
     paneLayout: PaneLayout,
     onMovePane: (PaneId, Int) -> Unit,
     onTogglePane: (PaneId) -> Unit,
-    onResize: (PaneId, PaneId, Float) -> Unit,
+    onResize: (PaneId, PaneId?, Float) -> Unit,
     onResizeFinished: () -> Unit,
     levelsContent: @Composable () -> Unit,
     visualContent: @Composable () -> Unit,
@@ -79,18 +79,16 @@ fun PaneWorkspace(
                     }
                 }
 
-                if (index <= paneLayout.order.lastIndex) {
-                    val upper = paneId
-                    val lower = paneLayout.order[index + 1]
-                    PaneDivider(
-                        enabled = upper !in paneLayout.collapsed && lower !in paneLayout.collapsed,
-                        onDrag = { deltaPx ->
-                            val fraction = deltaPx / heightBasis
-                            onResize(upper, lower, fraction)
-                        },
-                        onDragFinished = onResizeFinished,
-                    )
-                }
+                val upper = paneId
+                val lower = paneLayout.order.getOrNull(index + 1)
+                PaneDivider(
+                    enabled = upper !in paneLayout.collapsed && (lower == null || lower !in paneLayout.collapsed),
+                    onDrag = { deltaPx ->
+                        val fraction = deltaPx / heightBasis
+                        onResize(upper, lower, fraction)
+                    },
+                    onDragFinished = onResizeFinished,
+                )
             }
         }
     }
@@ -244,7 +242,7 @@ private fun PaneDivider(
                 text = "↕",
                 color = if (enabled) Accent else TextMuted,
                 modifier = Modifier.padding(horizontal = 8.dp, vertical = 1.dp),
-                fontSize = 13.sp,
+                fontSize = 20.sp,
                 fontWeight = FontWeight.ExtraBold,
             )
         }