The lot is 24 by 16 tiles. The mouse wheel zooms. To move a zoomed view, hold Space and drag, or drag with the middle or right button (outside Build a plain drag does too); a right click without a drag removes an object. The 2D/3D switch beside the camera controls changes views; the lit half is the view on screen. The props stay painted for the original camera. In Build, click a tile to place the chosen object, or focus the board and use the keys below.