‹ (previous room)
Screen: Room Devices (step 5 of 7) — the top line.
What it is
The arrow at the left end of the top line. It goes to the room before this one, across every floor. n / N shows where you are.
What to enter
Press ‹. At the first room the arrow is grey and does nothing.
What it changes
In the house: Nothing. It only changes which room the screen shows.
In the app: Nothing.
If it goes wrong
Nothing can go wrong. Rooms with no name are skipped.