To help the System Administrator remember which controls what, remember: Roles control Records Permissions/Rights.
Select Role Profiles Manager
From the Switchboard, navigate to the Configuration tab.
Select Configuration tab > Role Profiles
Out of Box Profiles.
Smart Completions provides a variety of out-of-box role profiles. These are the most commonly used Role Profiles on projects. If you click on the hyperlink of a given profile, you can check to see which roles are bundled into it.
You can also create new Role Profiles by clicking the "New" button at the bottom of the screen. The popup wizard will allow you to create a Role Profile name, designate it as Admin, and select the Roles to assign to this profile.