Editing Help:Diff (section)

{{Short description|Wikipedia help page for diff feature}}
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{{selfref|For the Wikimedia blog, see {{url|https://diff.wikimedia.org/}}.}}
{{Hatnote|This page documents the full usage of diffs. For a simpler guide to the basics, see [[Wikipedia:Simple diff and link guide]].}}
{{Wikipedia how-to|H:DIFF|WP:DIFF}}
A '''diff''' (from the word "''diff''erence") is a web page displaying the difference between one version and another of a Wikipedia page. A particular version of a page is called a "revision"; each revision has a date and time of creation which can be seen in the [[Help:page history|page history]]. Clicking a "diff" link in a page's history will display the diff of two successive revisions.

Links to diffs are found on various special pages other than page histories, including the [[Help:User contributions|User contributions]] page which every user has, [[WP:Recent changes|Recent changes]], [[WP:Related changes|Related changes]], and [[Help:Watchlist|watchlists]].

Using the history of a page, it is possible to generate a diff between ''any'' two versions – select the left [[radio button]] for the older version, the right radio button for the newer version, and click {{Button|text=Compare&nbsp;selected&nbsp;revisions}}.

While editing a page, the {{Button|text=Show&nbsp;changes}} button displays the changes you are about to make. The diff is also shown during an [[Help:edit conflict|edit conflict]].
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