Wikipǣdia:Edit summary
When editing an article on Wikipedia there is a small field labelled "Edit summary" under the main edit-box. It looks like this:
The text written here, up to 200 characters, will appear on the Recent changes page, in the page revision history, on the diff page, and in the watchlists of users who are watching that article. See m:Help:Edit summary for full information on this feature.
See also
adihtan- Edit summary legend - common abbreviations often seen in edit summaries.