🖱️ Mouse
Left Click — Select furniture
Left Drag — Move selected item
Right Click — Deselect
Scroll — Zoom in/out
Middle Drag — Orbit camera
⌨️ Keyboard
R / Shift+R — Rotate ±15°
Q / E — Raise / Lower
Delete — Remove item
G — Toggle grid snap
C — Open catalog
H — Toggle this help
Escape — Deselect / Close