If you just need to revert the latest edit to the previous version, use the revert handler
To restore an older version of a page, do the following:
- display the history of the page, using the second method.
- look for the version you want to restore and click on its link.
- click on the re-edit old version button at the bottom of the page (warning: do not use the double click to edit the page, because with this method you will edit the current version instead!)
- click on store (and it is good to leave a note which version you have restored and why in the "note on your edit field")
- finished. You have restored an old version of the page.