Hierarchy Plus expands the original plain GameObject tree in Hierarchy Window with many essential features.

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❇ SceneView Highlight and Pickup
Highlight renderer, sprite and UI element when mouse hover it in hierarchy or scene view. Outline selected sprite (Unity does not outline sprite). Switch and pickup overlapped object in scene view. [Video]

❇ Topbar
A tool bar on the top of hierarchy with several functions. Recent GameObject, Recent Scene, Save/Load Selection, Favorite, Note and Quick Settings

❇ Customize Display
Custom icon, icon tint, highlight, text color and bold for the label of GameObject. Row shading and separator, colorized tree line and highlight of level, main component as icon, children count.

❇ Exploring The Hierarchy
Click the icon to toggle the GameObject. Back to parent buttons collapse the tree to selected parent without scroll up the long list. Shadow Label show GameObject label in empty space.

❇ Function Buttons
View and toggle components and scripts. Show the tag, layer and sorting layer. Quickly set / view following state of GameObjects: (Selectable, Non-Editable, Favorite, Selection Base, Hierarchy Base, Static Flags, Prefab State, Gizmo Icon, Tag, Layer, Sorting Layer, Missing Reference, Log Message)

❇ And More
☑ Add note to GameObject, show in hierarchy or show in scene view as sticky.
☑ Persistent Data: If you change GameObject data during play mode, enable it preserves data change after exit play mode.
☑ Perform batch action to all children / selected.
☑ Copy and paste single / multi component.