Is it possible to make custom shapes?


I am a new Onyx user, and I have some questions regarding the built in shapes. I am currently upgrading an existing client from Martin LJ to Onyx (he needs more universes & One Key opens them all), but I can’t figure out how to make custom macro shapes for movements & shutter chases; is this even possible? The built-in sine wave variations just aren’t going to cut it. Thanks in advance!