Shift-Axis SnappingHold Shift while dragging endpoints to lock lines strictly to 0°, 45°, or 90°.
Reuse Existing LineClick "Reuse Existing Line" to calibrate using any connector already on your board.
Polygon Area & CutoutsTake off irregular rooms and subtract negative voids (stairwells, courtyards) in Cutout mode.
Multi-Scale Blueprint RegionsDefine multiple distinct scale zones on a single sheet for detail insets.