- Shift while drawing walls snaps to 15° steps.
- M starts the measuring tool: click two points to add a dimension. It snaps to corners and walls, and prints on the PDF.
- Ctrl+Z / Ctrl+Y undo and redo.
- Delete removes the selection.
- Esc finishes a run of walls or drops the current tool.
- Drag a box on empty space to select several things at once, or use Ctrl+A to select everything on the floor.
On a phone or tablet: tap to draw, drag to move the view, pinch to zoom, and use Finish walls to end a run.