Go to the Group Membership tab on the Edit User page to see the list of current assignments of the user. You may add a given user to other groups by selecting corresponding checkboxes or remove this user from groups by deselecting them.
You may also create new groups in the same window:
- Click the Add New Group.
- Type a name for the new group in the text field that will appear below.
- Click the Add button.
Once you click the Add button, the new group will be added and you will see a corresponding notification.
To keep the changes you've made, click the Save button. The "Manage Users" page will open, user information will be saved, and you'll see a corresponding notification.