Hi, in the next version of Vegas Pro please change "Curves", we can't play the curves properly. and at the same time it is absolutely necessary to make a different window for the curves because when we write less values we can't see the curves. and at the same time even if we pull the curve all the way like in the photo we don't get the stiffness we want, the graphic should be a bit stiffer. 

It is very important to do the curve hardening with 2 keyframes instead of 3 keyframes because if you look at the 2nd keyframe from the beginning, there is almost no image where I can move the curve because the value is so small that the curve is not visible.

It might be right to make a different window for the curves in it, like a small square box.