This is a log of changes to user rights performed locally by users ("manual" changes) or by system rules ("automatic" changes). You may enter either or both of:

• Performer – the name of the user who changed the rights (just their name)
• Target – the name of the user whose rights were changed (written with the prefix User:)

The list of user groups and their associated permissions is on Special:ListGroupRights.

The log does not show:

• Changes of rights by stewards (such as checkuser and oversight user rights) – see the meta global rights log (Enter usernames like this: User:Doe@enwiki)
• Local rights changes made prior to 24 December 2004 – see Wikipedia:Bureaucrat log.

• 20:04, 2 March 2011 Scientizzle talk contribs changed group membership for Scientizzle from administrator to administrator and edit filter manager
• 22:30, 27 April 2010 Scientizzle talk contribs changed group membership for UncleBubba from (none) to rollbacker (requested...seems reasonable)
• 21:18, 6 August 2009 Scientizzle talk contribs changed group membership for Victor Lopes from (none) to autopatrolled (re-establish per my WP:AN comment)
• 17:38, 6 August 2009 Scientizzle talk contribs changed group membership for Victor Lopes from autopatrolled to (none) (current AN thread concerns--feel free to reinstate)
• 02:22, 23 June 2009 Scientizzle talk contribs changed group membership for Scientizzle from administrator to administrator and autopatrolled (I consider myself "familiar with NPP practices")