As Standard there are three Role types;
Administrator - Full Access
User - Standard User
Report Creator - Report Creator
If you have full Administrator access yourself, you can manage which user accounts have which roles by doing the following:
Click Options then click Accounts
Click Users and then select the User
Select Groups & Roles
You can add which role you would like to each user account.
The Role restrictions and permissions are managed in:
Click Options
Click Accounts
Click Roles
You can add whichever role restrictions or role permissions you wish to allocate within this area.