Start PPT2002, execute tools → options command, open the Options dialog box,
Switch to the Save tab and select the Save AutoRecover info option.
Set a time in the following box (to reduce the loss, suggest that the time set is as short as possible), make sure to return, and then edit the document normally.
Once a panic or power outage occurs, when you start PPT2002 again, the system automatically opens a Document recovery toolbar, displays the missing documents, selects the documents that you want, and then saves them.
Note: Content edited during the last period of time before the crash or blackout cannot be restored.