天井 Ceiling
Press H. The ceiling is the upper face of each room's floor — set the level default here, then click a room to change its height, slope or cove.
ピン Pins / Reference points
Reference points walls and roofs snap to. Pick the Pin tool (P) and click on the canvas to place; switch to Select (V) to pick, drag, or edit a pin.
木製デッキ Wood Deck
Press D (or click Deck in the tool rail) on floor 1F. Drag a rectangle anywhere on the plan — the system builds 4 corner posts with footings, plus a plank slab on top. Heights and pillar sizes are adjustable per deck.
窓 Windows
Press N (or click Window in the tool rail) to enter Window mode. Click an edge to place, drag to slide, Delete to remove. Click a window to edit it below — default type & size live in Customize (C).
戸 Doors
Press T (or click Door in the tool rail) to enter Door mode. Click an edge to place, drag to slide, Delete to remove. Doors always sit on the floor surface (no sill) — default type & size live in Customize (C).