What's new in PowerPoint 2021 for Windows - Microsoft Support
https://support.microsoft.com/en-us/office/what-s-new-in-powerpoint-2021-for-windows-dac3eb1b-483b-4043-a0c9-5c01c2c1a8f2
WEBPowerPoint 2021 for Windows lets you create compelling content with the addition of features including co-authoring, Ink Replay, improved slide show recording, new stock media from the Office Premium Creative Content collection and new Draw tab additions such as Point Eraser, Ruler, and Lasso.
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