Overview
The Members Tab. This tab contains a list of all users setup in the system. Information cannot be modified on this box.
Location - How to assign Members to a Group:
Step 1 - Go to the Permissions Applet located in the Administration Module. Click on the Groups Tab.
Step 2 - Click on the Lock 
located next to the "Admin" group.
Step 3 - A "Permissions for Administrators" box will pop up. Click on the Members Tab.
Step 4 - Check the Is Member box next to the desired users to be included in the group, and click Save.
Is Member - When checked, this user is a member of this group.