User:DannyS712/Global watchlist/Config
By default, the only sites that are shown are meta, commons, wikidata, and enwiki. This can be customized by setting window.GlobalWatchlistConfig.sites
to an array of the sites you would like included.
A custom special page, Special:BlankPage/GlobalWatchlistConfig, can also be used on metawiki only to configure the sites you want to use without needing to edit manually. Each entry should be in the form "*.*" (eg: en.wikipedia, meta.wikimedia, www.wikidata) (up to version 1.7.5, the form was *.*.org - while this still works, support will be phased out eventually). This will overwrite any current settings.
See the history of the script at User:DannyS712/Global watchlist/Changelog.