You can create admin user with only one role assign to the admin user. You can either assign admin one or multiple role from user Inventory role, Users role, Online Store role, Websites role, Marketing role , Statistics role, and Edition role. Only thing you have to do is to create a user and assigne that user to admin user type and follow the steps below to assign user to the role.

Steps to create specific role for admin users

1. Open you browser type you website address and login to the admin center

2. Click Users from the top menu and select User Permission option from the drop down menu

3. Click on Modify Roles radio button

4. Click on Add button under Choose Admin Role box and type in new Role Name and Role Description and click on submit

5. Once the role is created Only allow Users role (or any specific role you want that admin to play) and Deny every else from first permission options.

6. Click on Save

7. Once option is save scroll to the top of the screen and click on Go back to User Roles

8. Select Assign User(s) to Roles

9. Next to Find User(s) text box type in admin user (created earlier) and select form the drop down box admin username

10. Under User Type Select Adminitrator radio button

11. Under Admin Role choose admin role (created earlier)

12. Save User Role