Unfold surface inside Inventor. Handle double curvatures surfaces. Handle ruled surfaces like cone/cylinders, ruled surface. When unfolding multi surfaces, the unfolded contours will be aligned as if you unfold a single surface. It unfold the curves/points with the surface in the same time so you know where the curves/points lie inside the unfolded surface contours.
It is very easy to use!
Surface unfolding is based on the type of the surface, e.g. whether the surface is ruled surface or surface with double curvatures. However, the program will handle all the cases for you automatically.