When performing 2D AutoCAD work, you generally work in drawings looking at the xy-plane. Moving or copying objects in the z-axis can be tricky if you are not comfortable with the correct Command line syntax, because often you cannot see the result of the move. NE is a command from previous contributor Theodorus Winata that makes this task easy. Start by loading the LISP file, then type in the command NE. Select your objects, and decide whether to copy or move them. Lastly, specify the delta. The objects you select are moved (or copied) to their new location. Theodorus's code is a good example of driving a built-in AutoCAD command with user input.