The AutoCAD.PGP file contains all the AutoCAD Command Alias’s (sometimes called Keyboard Shortcuts) that allow commands to be typed faster. Examples include L for LINE or C for CIRCLE.  A faster way to access, edit or reference these items is in the Express Tool called Command Aliases or the AutoCAD Alias Editor.

To execute this command select either Command Aliases from the Express Tools Ribbon or type ALIASEDIT at the command line. Next, select the appropriate PGP file from the menu (often called acad.pgp).  This will bring up the Alias Editor where you can add/modify these command shortcuts with ease!