Help:How to restore an old version

From IT frameworks

Reverting involves returning a page to a previous version of its history, as documented in the corresponding tab.

How to revert

Manual method

• Go to the page, click on "history" at the top ("Page history" in some skins), and click on the time and date of the earlier version to which you wish to revert.
• When that page comes up, you'll see something like "Revision as of 22:19 Aug 15, 2002" below the title, with the username of the editor who saved that version.
• Verify that you have selected the correct version, and click to edit the page, as you would normally. Important: in the case of vandalism, take the time to make sure that you are reverting to the last version without the vandalism; there may be multiple consecutive vandal edits, sometimes interspersed with constructive edits.
• You will get a warning, above the edit box, about editing an out-of-date revision.
• Ignore the warning and save the page. Be sure to add the word "revert" and a brief explanation for the revert to the edit summary. Some editors abbreviate "revert" as "rv". It is possible to wikilink the usernames associated with the versions you are reverting from and to. For example, an edit summary when reverting vandalism could be rv edits by 127.0.0.1 to last version by Username The clickable links are created by entering [[User:Username|Username]] (replacing Username with the real IP address or Username, for logged-in users). So for the edit summary above, you would type exactly:
  rv edits by [[User:127.0.0.1|127.0.0.1]] to last version by [[User:Example|Example]]
  When reverting blatant vandalism, "rvv" normally suffices, as speed is more important than a full edit summary with usernames or IP addresses.
• Click on "history" again. A new line will have been added, and you will be able to verify (by clicking on "last") that you undid the vandalism plus all subsequent bona fide edits, if any. It is courteous to redo all the constructive edits that were undone along with the edit(s) which you intended to revert, and this should always be done where it is reasonably possible.
• In a vandalism case where sections of text were simply deleted and then subsequent edits were made by others, it may be easier for you to cut and paste those missing sections of text back in than to revert and then re-do the edits.
• Check the contribution history of the user who vandalized the article. (Click on the IP address for anonymous users or the "contribs" for registered users.) If this user is vandalizing many articles, please report them to the administrators.

Undo

Latest versions of MediaWiki allow editors to revert a single edit from the history of a page without simultaneously undoing all constructive changes that have been made since. To do this, view the diff for the edit, and click on 'undo' above the newer version. The software will attempt to create an edit page with a version of the article in which the undesirable edit has been removed but all later edits are retained. There is a default edit summary, but it can be changed. It is also possible to make further modifications before saving.

This feature removes the need to manually redo useful changes that were made after the edit which is being reverted. However, it will fail if undoing the edit would conflict with later edits. For example, if edit 1000 adds a paragraph and edit 1005 modifies that paragraph, it will be impossible to automatically undo edit 1000. In this case, you must determine how to resolve the problem manually.