Draft Creates a surface at a specified angle to another surface along a curve. A draft angle of zero will tangentially extend a surface. A draft angle of 90 degrees will create a perpendicular surface. Revolution Revolve a surface about an axis or a non-linear curve. Offset Generates an offset surface from any Vellum Solids surface.
Tube Creates a circular section across any curve defining the tube centerline.
Plane Infinite plane surfaces are used to define cutting sections through surfaces or solids. They may also be used to split solids into several solids. Change Object Type command will explode a surface into curves or facets. You have many parameters to control the facetting of surfaces. Well behaved facets are needed for STL files.