Adding and removing groups is done in the Groups tab (see figure 4.7).
To create a new group, click the Add () button and enter the name of the group. To delete a group, select the group in the list and click the Delete () button.
When a new group is created, it is empty. To assign users to a group, click the Membership tab. In the Selected group box, you can choose among all the groups that have been created. When you select a group, you will see its members in the list below (see figure 4.8). To the left you see a list of all users.
To add or remove users from a group, click the Add () or Remove () buttons. To create new users, see Managing users.
The same user can be a member of several groups.