Unity Project

reference
https://cardgames.io/yahtzee/

Library/PackageCache/com.unity.timeline@1.2.15/Editor/Manipulators/Sequence/RectangleZoom.cs

@@ -0,0 +1,23 @@
+using UnityEngine;
+
+namespace UnityEditor.Timeline
+{
+    class RectangleZoom : RectangleTool
+    {
+        protected override bool enableAutoPan { get { return true; } }
+
+        protected override bool CanStartRectangle(Event evt, Vector2 mousePosition, WindowState state)
+        {
+            return evt.button == 1 && evt.modifiers == (EventModifiers.Alt | EventModifiers.Shift);
+        }
+
+        protected override bool OnFinish(Event evt, WindowState state, Rect rect)
+        {
+            var x = state.PixelToTime(rect.xMin);
+            var y = state.PixelToTime(rect.xMax);
+            state.SetTimeAreaShownRange(x, y);
+
+            return true;
+        }
+    }
+}