Sometime ago I’ve posted about modifying command aliases by changing it in ACAD.PGP, and also where to look for it. As what I have post, ACAD.PGP can be found on the support folder of the AutoCAD program folder. But that is applicable if your still using the previous version of AutoCAD, say AutoCAD 2002, AutoCAD LT or 2004.

It is safe to say that some advance users of AutoCAD, regardless of what releases of AutoCAD that they uses are using modified command aliases or command abbreviations. Some users also have their own personalized set of command aliases that they prefer to use it over the default command aliases available on AutoCAD. These aliases are usually the frequently used AutoCAD commands (eg. Line, Dimension, fillet, Trim, etc. etc.).