Physics automatism collision editor problem - no preview

Isn’t polygon collision editor supposed to show preview of object? If so, it doesn’t work for me, I see only empty checkerboard.

If it isn’t supposed to show preview, could you make it so it’ll show first frame of first animation of object you’re editing (if said object has any)? This way, we wouldn’t have to guess correct values, just point mouse to location we need to add point to and wrote down coords.