Manual:$wgShowUpdatedMarker/en

Details
If watchlisted page was changed after it was visited:


 * history page: new edits are marked with ""
 * watchlist: the page title is bolded

Also the watchlist has a message "" and a button "" that marks all entries as "visited".

If enabled, will display the number of active watchers of the page based on.

Dependencies
If  is false, this setting is ignored.

Styling
For different styling of watchlist entries see w:WP:Customizing watchlists.