A Rotary Surface can be inserted either graphically or numerically. A Rotary Surface can be entered graphically using the menu command Insert->Domain Geometry->Surfaces->Rotary->Graphically.
When a Rotary Surface is defined graphically, a dialog is first opened, in which one defines parameters of the surface, and only then one defines graphically a Rotated Curve (one or more; it is also possible to make selection using a Rectangle).