Creates a 3D solid or surface by extruding linework.
The following prompts are displayed.
Specify closed polylines, splines, ellipses, or circles to extrude.
Specify whether or not to retain the linework.
Specify the height of the extrusion mass element.
Extrudes selected objects along the positive or negative axis. The direction is based on the UCS that was current when the object was created, or (for multiple selections) on the original UCS of the most recently created object.