Error: Can't read file, or Presentation cannot be opened
Learn how to unblock a Microsoft 365 file or presentation that was blocked for security reasons.
Add closed captions or subtitles to media in PowerPoint - Microsoft …
In PowerPoint for Windows, macOS, and web, you can add closed captions or subtitles to videos and audio files in your presentations. Adding closed captions makes your presentation accessible to a larger audience, including people with hearing disabilities and those who speak languages other than the one in your video.
Video: Add and delete table rows and columns - Microsoft Support
How to add rows and columns for more data, or delete cells you no longer need.
Basic tasks for creating a PowerPoint presentation
PowerPoint presentations work like slide shows. To convey a message or a story, you break it down into slides. Think of each slide as a blank canvas for the pictures and words that help you tell your story. When you open PowerPoint, you’ll see some built-in themes and templates.