Admin - How do I give a user Admin rights?
You will need to be a SuperAdmin to give Administrator rights to an existing user.
To give Administrator rights to an existing user:
Select the user in question from the User List, and click the "Security and Access" tab
Use the "Access Level" drop-down to select the level of user rights
Select the appropriate level for the user

Set the appropriate Admin rights for the user

You can set a user to administrate only certain aspects of your site using the checkboxes under "Admin Roles". After that, click "Save" at the bottom of the page.