To set an option for a signature to be
attached after you save a file
Do one of the following:
Click Tools menu Options.At the command prompt,
enter options. In the Options dialog
box, Open and Save tab, click Security Options.
Click File menu Save
As.At the command prompt,
enter saveas. In the Save Drawing As
dialog box, click Tools Security
Options.
In the Security Options dialog box, Digital
Signature tab, select Attach Digital Signature After Saving Drawing.
Click OK.
NoteIn the Security Options
dialog box, you can attach digital signatures only to files that
are compatible with the AutoCAD 2000 and later drawing-file formats.