Click on "Administration".
Click on the "User and Role Management" tile.
Click on the "Roles" tab.
To edit an existing role, click on the role's Actions Menu (...), then select "View Role".
To add a new Role, click "Add Role".
Add/Customize a "Name" for the Role.
Turn ON permissions by selecting check boxes. Turn OFF permissions by de-selecting check boxes.
There are over 200 different permissions that can be customized for each role.
When finished, click the "Save" button.