Click and Drag. It makes a Selection Box using clones. Now I have the SAME PROBLEM that I'm having with EVERY SINGLE PROJECT that I have recently made. There is no easy way to keep certain pen strokes on the screen. I want to paste a box, but I can't. No easy way, and I don't yet even know the mythological beast of a workaround that some people claim exists.
@c1ff A question: why does this work on the project page but not in the editor? Nevermind, it's a draggability issue. I checked "can drag in player" in the sprite options and now it don't work on the project page either. Turning it back off so it works again.