Have you uploaded a new version of a proof and need to see what changes have been made? Easily overlay proof versions and highlight changes between versions.
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To compare two proof versions in the overlay mode, click View all versions in the side bar and select the two proofs that you would like to compare. Click Compare selected. You can now drag the slider back and forth to show more or less of each proof.

Click Highlight changes in the upper right of this comparison screen to see pink markings to call out the differences: