Use the arrow keys. If you are done with looking at the angles press space. If you wondering about a specific angle, go to it and press a. If you are having trouble with where to put your pointer, just go to the bottom left of the point you are trying to access, and press a. Or you can press c and answer with "B", "Y", "X", "A", and "P".
This is for my math class. Updated, all features are done.
