Keys
Walking: WASD move, drag or ←→ to turn, Shift to hurry
Flying: ↑↓ up and down, free of the floor until you come back down onto one
Double-click to lock the mouse for looking, Esc to free it
N next place, B previous, V back to walking
O overview, P plan, [ ] one level down or up
L room labels, H high or fast rendering
Overview: drag to orbit, scroll to zoom, right-drag to pan
Click anything to see its id and size
? this list