To create a user/domain group, do the following:

1. Click the button near the group to which the new group should be added. The first groups are created within the root group.
   
2. Select Add group.
   
   
   
3. Enter the group name and click the Assign button.
   

The group is created. 

To edit the group name, click the  button and then click Rename, to delete − click Delete. Only the groups with no users or domains within them can be deleted.