Start a base
Lay a Floor (F), draw Walls (W) in wood, log, stone, brick or metal, then drop game objects from the list on the left. Name areas with Zones (Z) and Labels (T), add levels with +, plan upgrades as stages, check the walk with Route (P), and press ▶ Play to walk through it as a survivor. Tab switches between the in-game view and the top-down blueprint.
Exploring
WASD or arrows walk · Shift runs · Alt sprints · click to walk there · scroll zooms