Go to Admin Menu > People > Roles > Add a new role.
On the Add Role screen:
Role Name text field = enter a descriptive name for your role.
Click the Save button.
On the Roles screen:
Grab a role by the mover handle and drag it up to the desired position.
Once everything is ordered to your liking, click the Save button.
The roles we use here at OSU are as follows, in order from least permitted to most permitted: