Adding / Removing Assigned Users
To add or remove a user - click on the "View Assign" link for the Users column on the user role you wish to change – you'll see a pop-up list of the users in the account currently. Check the box (or uncheck to remove) to assign the role to the user. Once this is done, the user will gain all the permissions of the role. Furthermore as you make changes to the role in the future, those permissions changes will propogate to users assigned to the role.