MediaWiki:Twocolconflict-split-tour-popup1-message
MediaWiki interface page
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When there's a difference between the other user's text and yours, the two versions are shown side by side: the other user's version in the yellow box on the left side and yours in the blue box on the right.
When there is no difference between the two versions, the lines are shown in grey boxes. These can be expanded or collapsed and edited if needed.