Block or unblock external content in Office documents
To help protect your security and privacy, Microsoft Office is configured by default to block external content—such as images, linked media, hyperlinks, and data connections—in workbooks and presentations. Blocking external content helps to prevent Web beacons and other intrusive methods that hackers use to invade your privacy and lure you ...
Error: Can't read file, or Presentation cannot be opened
If you've arrived at this article because you got an error message that PowerPoint can't read a file or that the presentation cannot be opened, it's likely that Microsoft 365 has blocked the file for security reasons. You can unblock the file so it can be opened:
Unlicensed Product and activation errors in Office
If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.
Set up the Office app and Outlook on iOS devices
Use popular Office apps like Word, Excel, PowerPoint, and OneNote on your iPhone, iPad or other iOS device. Set up email using Outlook for iOS.
Highlight your text - Microsoft Support
Highlight your text. Applies To. Text highlighting in PowerPoint 2019 and newer versions lets you mark text in yellow or another highlighter color. (This feature is available on both Windows and macOS, and it's available in your browser in PowerPoint for the web.) Windows macOS Web.