This is an editor extension that run’s in the scene view, and any game object with an Animator component can use this extension as along as it deals with sprite animation. The extension allows you to preview the animation, and modify the sprite’s pivot accordingly from the scene, to make sure that those sprites align correctly with each other with whatever animation clip they belong to. You can also use this extension along with the Sprite Renderer component to modify the pivot point of whatever sprite it hold from within the scene as well.
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