Wikipedia:Simple diff and link guide
 | This help page is a how-to guide. It explains concepts or processes used by the Wikipedia community. It is not one of Wikipedia's policies or guidelines, and may reflect varying levels of consensus. |
| The 3-tier diff and link series |
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Why use diffs and page section links?
If you contribute an argument to a page like requests for comment, requests for arbitration, or the incidents noticeboard for administrative attention, it's essential to give evidence for your claims in the form of diffs and/or other links. Without such evidence, you will be taken less seriously. If you simply claim that "editor X has posted several personal attacks on talkpages" or "editor Y is edit warring on George W. Bush", you may be ignored, or told "diffs or it didn't happen".
The most useful evidence consists of diffs to individual edits and links to page sections. Don't link to entire talkpages, as they are too long and diverse to be helpful. Avoid linking to a page history or an editor's contributions, as those will probably have changed by the time somebody clicks on your link to view them.
How to harvest a diff
Find the page which contains the edit you want to refer to. Click on its history tab. Find the edit in the history list. (If that's a problem, clicking on the word prev in the list will let you read the edit.) Right-click on its "prev" button and select "Copy link location" or "Copy Shortcut". The diff you want is now in your clipboard.
How to harvest a page section link
Find the page which contains the section you want to refer to. Click on "Permanent link" in the "Toolbox" in the lefthand sidebar. Go to the page's Table of Contents. Right-click on the name of the section you want to use, where it appears in the Table of Contents, and select "Copy link location". The section link you want is now in your clipboard.