I tried it. Pressing M does this:
Pressing it again returns it to the same position with the top cut-off.
Tried out Marabu but had a small bug.
You can see, the pattern editor columns are not displaying properly. It looked like this even after closing and restarting, and after re-downloading the program. It seemed to be functioning normally, it was just displaying weirdly. This is on windows 10, if that helps.
Thank you, I like your work!