See it as

Screen: Room Devices — the phone preview (opened with Preview).

What it is

The person the preview is shown as. Each person sees only their own rooms; the Guest sees the guest rooms.

What to enter

Pick a person. The preview is built again for them.

What it changes

In the house: Nothing.

In the app: Nothing. It only changes the preview.

If it goes wrong

• With nobody in Users, the preview does not open and asks you to add a person first.
• A room hidden from phones is not shown to anyone.