The Go To->User List command brings up the User List page. This page lists all users known to the Perforce server. Each Perforce username has a specification, or user spec, associated with it. Clicking on a user name in the User List page allows you to view its user spec.
For information about the contents of a user spec, see the help page on editing your user spec.
You can only modify the user spec for the user your P4Web Helper supports. This is the user name shown at the top of P4Web pages. To modify a user spec, use Go To->Edit User.