This is with a native C++ application, by the way, rather than Unity or UE4. The purpose is to account for TV overscan.
I thought View::Resize() would work, but rather than scaling the entire view, it simply drew a subset of it, cutting off whatever wouldn't fit in the new size passed in on the bottom and right sides. I'm not yet completely familiar with Coherent GT, and I'm still investigating, but I'm hoping I won't have to quickly ramp up on DirectX, etc. to accomplish this.