Included are an Autocad lisp file (acad.lsp) and lisp routines to save time on routine chores and some routines to amaze your friends and coworkers. I recommend creating a directory called "LISP" to keep the routines in and putting the ACAD.LSP file in your Autocad directory. Make sure you set the path to the new lisp directory so Autocad knows where to look. If you currently have an acad.lsp file you will want to save it somewhere in case of a disaster. 

The file acad.lsp can be viewed and edited with your favorite editor. The first section of the file before the "run" function are shortened standard commands. The keystrokes that invoke the commands can be changed to whatever you want, for example:

The command line (DEFUN C:A ()(COMMAND "ARRAY"))
can be changed to (DEFUN C:AA ()(COMMAND "ARRAY"))
if it's easier for you to remember "AA" than "A", the choice is yours. Just be careful not to duplicate command names or you'll have trouble.

The command lines after the "run" function invoke lisp routines. You can change their names in the same manner if you wish. The "standard" commands in the beginning of the acad.lsp file are pretty self explanatory as far as what they do, the following is a list of the lisp routines and their functions.

BALL- prompts for the beginning of a leader line and the center of a balloon, for calling out parts in an assembly drawing.

CENTER- draws centerlines in circles

CG- text editor that replaces every occurrence of an "old string" with a "new string" of text. Works only on text picked or windowed.

CL- changes layer of objects picked or windowed to the layer you pick on the screen.

CR- copy rotate anything, point to point or specify angle (select the same point for rotation, first point and second point), keep or delete old items. Handy for things in motion, cylinders etc.

DLL- deletes EVERYTHING on the layer you pick.

HC- "heals" circles that have sections removed from them or turns arcs into circles.

HL- "heals two line segments together, the new line is one entity that is the layer and linetype of the first line picked.

LEAD- leader line routine that allows for multiple lines of text.

PAR- offsets two lines, either side of a picked line, parallel to the line, on the current layer.

SS- stretch by window, add and remove items.

SLOT- draws a round end slot.

TA- allows lines of text to be added to existing lines of text.

TXSIZE- global text size change, pick or window.

UT- underlines picked text.