Understand how to save PowerPoint presentations, including using the PowerPoint save as PDF function, in this free lesson.
PowerPoint automatically saves your presentations to a temporary folder while you are working on them. If you forget to save your changes or if PowerPoint crashes, you can restore the file using AutoRecover.
By default, PowerPoint autosaves every 10 minutes. If you are editing a presentation for less than 10 minutes, PowerPoint may not create an autosaved version.
If you don't see the file you need, you can browse all autosaved files from Backstage view. Just select the File tab, click Manage Versions, then choose Recover Unsaved Presentations.