Using xcode, how can I diff between a working copy of a file and the latest commit in the respository?

Question

Here are screenshots.

Click the Version Editor button in the top-right (highlighted box):

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Then, click the revision to compare with (footer highlighted box):

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Also, you can navigate through each change using these buttons: < and >

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Finally, you can undo a single change with “Discard Change” like so:

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