How to crop in Boris Red?

I've been a Media 100 user since forever, currently on Suite 1.6.2, and I seldom use Boris Red except for titles and simple things like that. Is it just me, or do things seem less intuitive in Red? Today I was trying to figure out how to crop a video in Red, but it was an exercise in frustration. By comparison, it's really easy to crop a video in After Effects. Perhaps it's because I use AE more often and I'm just used to it. But can anyone tell me how to do this in Boris Red? I'd really like to know.