AutoCAD 2008 User's Guide > Start, Organize, and Save a Drawing > Open or Save a Drawing > Save a Drawing > 
Save a Drawing
Concept Procedure Quick Reference
 
 
 

To save a backup of the previous version every time the drawing is saved

  1. Click Tools menu Options.At the Command prompt, enter options.
  2. In the Options dialog box, Open and Save tab, select Create Backup Copy with Each Save.
  3. Click OK.