Note: To complete these steps, you must be assigned a role having the necessary permissions within the site.
Go to Site Info.
Select the Site Info tool from the Tool Menu of your site.
Change the role from the drop-down menu in the list of enrolled participants.
Search or scroll the Participant List to locate the participant. Next to the participant(s) whose role(s) you want to change, select the appropriate role from the drop-down menu in the Role column.