Output Panel
Tracing guides
Tracing guides lets you draw lines over the projection while it's lit on your surface, so you can outline windows, doors, and edges exactly where they are.
Click in the output panel header to start tracing. Click to add points, and click the first point again to close a shape. Press Enter or double-click to end an open line, Backspace to remove the last point, and Escape to cancel. Guides are drawn in bright green on the output window so you can see them on the building.
Right-click a closed guide to turn it into a mask, or into a surface if it has four points. Turn off Show on output to hide guides from the projection without deleting them, and click Clear to remove them all. Click Done when you're finished. Guides never appear in exported videos.
Next, learn to use multiple projectors.
Try tracing guides yourself, below.