View source

From Meta, a Wikimedia project coordination wiki

When a page is protected, certain users cannot edit it. Semiprotection disallows IPs and new users from editing a page, while full protection stops anyone but sysops. However, no matter what level of protection a page is given, any user is free to view the source, an action that is denoted view source where the edit tab typically is. In this way, anybody can copy and examine the wikitext of a page to their heart's content, but no changes can be made.

Often, the view source function will be forced to all users when the database is locked down by developers for maintenance or when the slave server needs to catch up to the job queue.

The view source form is shown below.