AutoCAD 2008 User's Guide > Work with 3D Models > Create 3D Models > Create 3D Solids and Surfaces > Create Solids and Surfaces from Objects > 
Create Solids and Surfaces from Objects
Concept Procedure Quick Reference
 
 
 

To convert one or more objects to surfaces

To create a planar surface from an existing object

To create a planar surface by specifying the corners of the surface

To convert objects with thickness to extruded solids