By increasing the number of blend steps you can create some complex highlight shading effects. One of the most powerful features of Xtreme Pro is that it allows blends from just about any shape to any other shape, with dissimilar numbers of handles.
The two shapes have different numbers of handles, and a blend from one to the other produces the result on the right. It has a twist in the top right corner.
**You can control exactly which point handles map**, when creating the blend, by dragging from the point handle of one shape to a corresponding handle on the other shape. You will need to have both shapes selected in order to see the control points.

Какое значение имеет здесь слово "map" и фраза в целом?

Большое спасибо!