I was playing with flex scheduling and somehow deleted two zones. So I tried to set up a zone in the on line app but can find no place to do that. I then tried to set up zone on the iphone app and all it seemed to want to do was to test one zone after another. So now I'm puzzled how to do the simple thing of defining a new zone?
My Yard > Show Disabled Zones
You can then setup one of those zones. Should be the same for web and mobile.