Pick a mode, then click the map. Paint marks walkable tiles. Erase (or right-click) removes whatever's under your cursor — a tile, a waypoint, or a placed building. Click an asset below to arm it, then click the map to place it. Export when done.

No tool selected? Left-click drag pans the map. Right-click drag always pans (unless Erase is on). Click a location's "Portal to" field below to make it jump to another map on arrival.