when I tried to add another zone, the system ask to do a signal check again, so then ask me to change the location of the Anthena and based, so then the initial zone does not work , this is not good

I have followed this exactly but never see a Done button.

In my case, "[Edit]" next to the delete button (at 0:12) is not there - how do I get this, so I can make modifications? (I can only delete the whole thing and create a new one from scratch, which is painful.)