细化一些UI

我觉得TimelineCanvas可以利用一下
比如把note放在上面？

Assets/Prefabs/DynamicUI/Hierarchy/HierarchyTab.prefab

@@ -340,8 +340,8 @@ RectTransform:
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
   m_AnchorMin: {x: 0, y: 0}
   m_AnchorMax: {x: 1, y: 1}
-  m_AnchoredPosition: {x: 0, y: 0}
-  m_SizeDelta: {x: 0, y: 0}
+  m_AnchoredPosition: {x: 222.04614, y: 0}
+  m_SizeDelta: {x: 444.0923, y: 0}
   m_Pivot: {x: 0.5, y: 0.5}
 --- !u!222 &2384484496230206924
 CanvasRenderer:
@@ -364,7 +364,7 @@ MonoBehaviour:
   m_Name: 
   m_EditorClassIdentifier: 
   m_Material: {fileID: 0}
-  m_Color: {r: 0, g: 0, b: 0, a: 0.39215687}
+  m_Color: {r: 0.39215687, g: 0.39215687, b: 0.39215687, a: 0}
   m_RaycastTarget: 1
   m_RaycastPadding: {x: 0, y: 0, z: 0, w: 0}
   m_Maskable: 1
@@ -829,6 +829,7 @@ MonoBehaviour:
   tabLayer: 0
   isSelected: 0
   isExpanded: 0
+  BgImage: {fileID: 6938976402216252178}
   tabRect: {fileID: 5040017337088069702}
   layoutElement: {fileID: -1606289094185495319}
   tabMainRect: {fileID: 4977671911614392296}