how do you cut away walls?

@Npappas1989Expanding on @manzana0807, End and Home bring them up and down in stages. If your walls are all the way up, End will bring them partially down to cutaway mode (My favorite). Hitting End again will bring them all the way down. Once down, Home will bring them back up in stages.

If your home/end keys aren't doing it, then check and see if you have a a keyboard program that is re-mapping your keys and see if you can turn it off.