Undo, redo, or repeat an action - Microsoft Support
网页You can undo, redo, or repeat many actions in Microsoft Word, PowerPoint, and Excel. You can undo changes, even after you have saved, and then save again, as long as you are within the undo limits (By default Office saves the …
Install Office updates - Microsoft Support
网页Try Microsoft Update or contact your company help desk. To download an update manually, see Office Updates. If you would like to update Office but can't open any of your Office apps, try repairing your Office suite: Go to Control Panel > Programs > Uninstall a program.
Improve accessibility with the Accessibility Checker
网页Improve accessibility with the Accessibility Checker. Before you send an Outlook email message or share a Word document, Excel spreadsheet, PowerPoint presentation, or OneNote notebook, run the Accessibility Checker to make your content easier for people with disabilities to read and edit.