mraneri,

Each zone has it's own "home" page. All home buttons in a given zone point to that zone's home page. On a "home" page, one can move between zones.

Don't allow changing zones to be accidental, but it should not be a chore either. Make sure that the user can always know what zone and which device they are controlling.

Tip: Don't change the "Home" label on the original home page. If you want to present something different to the user, learn ProntoScript. Tinkering with labels is a very easy first program.