• You can undo or redo complete macros, but you cannot use Undo/Redo inside macros.

• Undo or Redo cannot undo or redo:

◦ Commands related to parametric design, hidden lines, PIXMAPs, or OLEs. Once you have executed one of these commands, you can no longer undo or redo any of your previous commands.

◦ The RESET_SYSTEM command.

◦ Commands for default settings (although these commands do not affect the undo/redo history).