(If you selected Users in the right pane, double-click Users to open the Users tools.)
To begin: in the right pane of this window, double-click User Accounts, User Templates, Rights, Administrative Roles, Groups, or Mailing Lists.
Tip: Every user must be a member of at least one group, the primary group for that user. Before you add a new user, first decide what the user's primary group will be (the default group is "staff"). Then, if necessary, add that primary group before adding the user account.
For more about Users, see About User Accounts.