Lets you create a curve-on-surface by drawing it manually.
The mathematical degree of the curve created, which control the number of CVs per span: 1 (linear) or 3 (cubic). The default is 3.
A “knot” is the parameter value of an edit point.
Chord – The chord length parameterizes the new curve edit points in current units.
Uniform – The new curve edit points have integral parameters: the first edit point is parameter 0.0, the second is 1.0, and so on.