The Privileges tab lists the priviliges defined for your site, and shows which privileges are associated with the role. Changes to the privileges assigned to the role are effective immediately.
Assigned Privileges: This list box contains a list of all of the privileges currently assigned to the role.
Not Assigned: This list box contains a list of all of the privileges not currently assigned to the role.
Add: Selecting this button will move a privilege from the "Not Assigned" list to the "Assigned Privileges" list. Select the privilege to be moved, then select this button.
Remove: Selecting this button will move a privilege from the "Assigned Privileges" list to the "Not Assigned" list. Select the privilege to be moved, then select this button.