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1. In the CMS, navigate to Users → Website Users. 
   
   
2. Search for and edit the required user. 
   
   
3. If the user currently has just one role, you'll see an 'Assign Multiple Roles' button - click that.  
   
   
   
4. If they have multiple roles already, go to the Roles section and click 'Assign New Role'.
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5. Select the required role from the dropdown and click Save & Exit.

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