...
You may hold ⌨ Shift to draw lines in straight ↔ or @vertical ↕ directions.
🖱 Right-click Click to remove points, and if all points have been removed, a subsequent right🖱 Right-click Click will exit zone drawingZone Drawing-modeMode.
...
When drawing zonesZones, the mouse 🖱 will snap Snap to existing aligned points of previously created zonesZones, as well as to points on adjacent levels close to the click location. The snapSnap-lines Lines are visually shown while in zone drawing-mode projecting out from the aligned point. If you would like to override a aligned snap point Snap Point, zoom in further which will reduce the snap distance.
When a zone Zone is created, all lines drawn will become walls Walls, and a single floor Floor & ceiling Ceiling encompassing the shape will be created. If there are any adjacent walls Walls near the new zoneZone, walls Walls may be split Split and connected automatically to these. Likewise any zones Zones on adjacent levels will cause the floors Floors & ceilings Ceilings to split Split automatically and connect to these adjacent floors Floors and ceilingsCeilings.