Editing Dark and Light Wiki:Administrators guide (section)

===Hiding individual revisions===
Sometimes it is necessary for a single revision to be deleted, rather than the whole page. This is useful when a user adds personal or sensitive information, such as access keys and passwords. If you see this, revert it immediately, and hide the revision. The Delete/undelete revisions page can be accessed through the history page.

Hiding a revision removes the text, edit summary and/or the user's name or IP address from public viewing. Only other administrators can see the hidden revision.

The following options are available:
# '''Hide revision text'''. Almost always used.
# '''Hide edit comment'''. Only to be used if the edit summary contains sensitive information.
# '''Hide editor's username/IP'''. Unlikely to be used.