The User rights section 
allows you to set particular permissions for users in this course, including the right to add events to the Agenda, to add Announcements. It also allows you to hide personal user pictures in the Forums, as well as decide whether users have access to the Users list.
(Note: This is independent of the visibility of the tool in the course homepage and is a real access change (the visibility of tools is only a homepage setting and does not prevent users entering the tool if they know the URL).
Illustration 175: Course settings – Users rights
