public void UpdateTool() { HandleUtility.AddDefaultControl(GUIUtility.GetControlID(FocusType.Passive)); _grid.DrawGrid(); Handles.BeginGUI(); GUILayout.Window(0, new Rect(15f, 20f, 135f, Camera.current.pixelRect.height - 20f), DrawPrefabPreviewWindow, "Level Editor"); GUILayout.Window(1, new Rect(Camera.current.pixelRect.width - 150f, 20f, 135f, Camera.current.pixelRect.height - 20f), DrawBackGroundWindow, "Background Materials"); Handles.EndGUI(); }