Page history
GMGo back to an earlier version of a page.
1Open the history
Page history at the top right of a page lists its earlier versions, newest first, with the date and a preview of the text. History starts with the first edit made after the page was created.
2Restore a version
Select a version and choose Restore selected version. The page as it is now is saved to the history first, so restoring is itself something you can undo.