The Select Group dialog is presented in response to the following action:
The Select Group dialog has a Group list as well as OK, Cancel, and Help buttons.
The Group list has a row for each Group of which the User is not a member. You select a group by clicking on it. Once selected, a Group row is highlighted. You may select multiple groups by ctrl- or shift-clicking them.
Clicking OK will dismiss the Select Group dialog, and update the User.
Clicking Cancel will dismiss the Select Group dialog without updating the User.
Help will display this information.