SnapIn Options
/ Allow document backup
Enables document backup. You can purge a document backup, or replace the main document by reverting to the backup. Turn this option on to add commands to the following Shortcut Menus:
Purge Backup(s) (Shortcut Menu)
Drawing Document Shortcut Menu
Choose how backup should work
Specifies how the software creates backups.
Default
Creates backup documents when you select a command from one the Shortcut Menus listed above.
Update
Creates backup documents automatically when you update a document or component.
Manual
Adds new menus for document and component backups.
Creates a backup document for each document, and then updates the document whether or not it is out of date. This shortcut command is available for components in the Management Console and for documents in the Detail View.