This section explains how to create and use various kinds of stamps.
Stamps must be created on walls, or walls on edge, except for the stiffness rib that is to be created on a bend.
If a stamp is created over the limit between several supports, such as walls, bends, and so forth, this stamp is invisible on the unfolded view.
When unfolding a 3D shape, only the largest imprint of the stamp is retained on the stamped wall.
Stamps cannot be created on an unfolded 3D shape.