In this chapter, the modify commands used for editing 3D solid objects were discussed in detail, starting with basic commands (including move, copy, mirror, and scale) that are used in 2D drafting and can also be used with 3D objects but with limitations. 3D versions of these commands were also introduced that are easier and quicker when used with 3D objects, in addition to removing the limitations of the basic ones.

After this, Boolean operations (union, subtract, and intersect) were discussed in detail, with examples provided for each operation, followed by three groups of editing commands. The first group dealt with solid modifications, including the slice and Thicken commands, the second group included those commands that specialized in editing faces, and the final group covered edges.

In the previous chapters, Chapter 11: Creating Primitive 3D Shapes, Chapter 12, Conversion between 2D and 3D, and this one, we dealt with solid 3D objects. The next chapter will explore the other types of 3D objects that are available in AutoCAD, which are surface and mesh objects.