1: Click on the tab labeled USERS in the lefthand menu.
2: Find a user you wish to change and click the three dots under ACTION. In the drop-down, click on EDIT ROLE.
3: You can now choose between roles. The first is SUPER ADMIN. This is the highest level, and allows total access, as shown in the highlighted section below. This role can change settings for the account.
4: The next is FOLDER ADMIN. This role allows full access, like SUPER ADMIN, minus the ability to change account settings.
5: FOLDER CONTRIBUTOR allows media upload access, and access to reports, but disallows permissions for altering or adding users.