Wall size in. Drill marks out.
Starter values are examples. Replace them with this room's numbers.
New rooms start from the current room's values.
Type inches (156, 55 5/16, 13' 6) or switch to mm.
Approximate 16:9 panel. Use the spec sheet for the real outside width and height.
Ask an AI agent to research your TV and mount, then paste the JSON it returns. Every room in it is added to your list. Browser agents that support WebMCP can also fill this page directly.