Currently, only an Admin user can create and edit an existing zone.  If you would like to do this, you can log into https://tune.cloudcovermusic.com.  Once logged in, select the 'Account' from the top of the page, and select 'Zones' from the left navigation menu.  
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Find the zone you would like to remove and then select the trashcan icon, (scroll all the way to the right)  

If you need to create a new zone, please click here.