Template:MW notices

Commons has 3 kinds of top of page messages that can be used to convey information or announcements to readers and editors:

An extensive and configurable watchlist notice system
The "Sitenotice", found at MediaWiki:Sitenotice, is displayed at the top of all pages for all logged-in users, and for anonymous users if MediaWiki:Anonnotice is empty; this latter message can be used to display information only to users who are not logged in. Alternatively, by 'blanking' the anonnotice and replacing it with <p></p>, the sitenotice can be used as a "logged-in-notice" to display information only to users who are logged in. MediaWiki:Sitenotice-translation provides localised sitenotices via {{LangSwitch}}, using MediaWiki:Sitenotice for en. MediaWiki:Sitenotice can contain any markup but must contain a <p>-tag. The contents of this <p>-tag are then replaced by MediaWiki:Sitenotice-translation, loaded by a script in MediaWiki:Common.js
There is also the CentralNotice, found at meta:Special:CentralNotice, an extension which can display banners at the top of a select group of Wikimedia sites simultaneously.

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