Drag a room by its wall to reposition; rooms snap to each other's edges.
Place a note outside the room with an arrow pointing inside. Drag the text or the arrowhead to reposition.
Wheel = zoom toward cursor. Middle-click or Space + drag = pan. Keys: + − 0.
Measure: click two points, snaps to horizontal/vertical. Esc cancels.
Auto-saves locally as you work. Named saves stored in your browser; export to share or back up.
Click an object, note, or room wall to edit it.