SUMMARY: If PowerPoint 2010's Undo feature doesn't remember enough edits, force it to remember up to 150.
While frantically putting together a presentation in Microsoft PowerPoint 2010 at the last minute, you're bound to make some mistakes. Don't worry - you can easily undo edits by pressing Ctrl + Z. In fact, PowerPoint by default remembers up to your last 20 edits, so if you make a mess of things you should be able to recover. (Of course, you should still save your work often, and perhaps create backup copies at different stages of your presentation editing.)
For many people 20 edits is enough. However, if you need PowerPoint to remember even more edits (up to 150), the following tweak should help:
1. Select the "File" tab in the Ribbon.
2. The Microsoft Office Backstage View appears. Click the "Options" button.
(Or instead of steps 1 and 2, press Alt + T, then the letter O.)
3. The "PowerPoint Options" dialog box appears. Click "Advanced" in the left pane.
4. Underneath "Editing options", next to "Maximum number of undos", click the box and enter the maximum number of edits you wish PowerPoint to remember, from 3 to 150.
5. Click "OK" on the bottom-right of the dialog box to close it.
Return to the Microsoft PowerPoint 2010 page.
The MalekTips website was created in 1998 by Andrew Malek of Envision Programming. The page's goal is to freely disperse computer-related tips, hints, and informative articles. Tips are organized to be easy to find, and are presented clearly, in easy-to-understand language.