Ok, I know many of you know some of these, maybe even a few that know about all of them, but there are new AutoCAD users every day... Some of these are old and some are new.

So what is your favorite "obscure" command?
  1. CONVERTPOLY (R14-R2010) - This undocumented command will allow you to convert "heavy" polylines to LWPOLYLINE's and vice versa. "Heavy" polylines are the pre-R14 version. They still have uses today, and the PLINETYPE system variable controls what gets created by default.
  2. DBLIST (Version 2.0 - R2010) - This command will list every entity in the drawing. Useful when you think you have some entities that are not showing up. You can erase everything visible and then run DBLIST to see what else is still there.
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