The shape knob adjusts the offset of whatever is in the triangle input. The cv also does this. the cv will work with audio range input and produces sort of a fm effect with an audio rate modulator.
The sine shaper section is a little easier to understand. It takes a triangle and outputs a sine. When the shape pot is at noon The output should be a pretty close to perfect sine, depending on the symmetry of the triangle. The cv and pot both shape it in the same way as the ulfo. Here's a short video of it in action:
Like the saw section, the sine shaper cv will work at with audio rate modulators creating a effect that sounds like a cross between fm and a ring modulator. This is a great add on for a vco lacking a good sine out and will work just a well with a lfo as it does with a vco.