Changing a user's group membership
select a user name,
then select Modify from the Users menu.
Click on the Change Group Membership button.
To add user to a group, select an entry in the ``Other Groups'' column and click on the Add button.
To remove a user from a group, select an entry in the ``Member of'' column and click on the Remove button.
You can search for a specified group by entering the name in the ``Search for:'' field.
To change the set of default groups assigned to new users, select User Defaults from the Options menu.