AutoCAD 2008 User's Guide > Work with 3D Models > Modify 3D Solids and Surfaces > Select and Modify 3D Subobjects > Modify Vertices on 3D Solids > 
Modify Vertices on 3D Solids
Concept Procedure Quick Reference
 
 
 

To delete a vertex on a 3D object

  1. Press and hold CTRL.
  2. Click a vertex on a 3D object that connects two edges that are parallel and co-linear and do not lie on any other edges.
  3. Release CTRL.
  4. Press DELETE.