Note:
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A snapshot is just a picture captured at the time the view was saved. Elements in that picture may have been modified or deleted since the picture was saved, so when the content of the view (the Drawlist) is restored, the scene can look different to the snapshot picture. In fact, it is possible that an empty view can appear if all elements in the drawlist have been deleted or moved outside of the view area since the original view was saved.
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