How to Remove Picture Background in PowerPoint
A screenshot is a snapshot of an area on your screen that you can use as an image in your presentation.
To cancel a screen clipping, press Esc when the screen clipping mode is active.
You can remove the background of any screenshot, picture, or graphic in your presentation.
A new tab appears on the ribbon, and the picture is highlighted with a bright magenta color. Any magenta areas will be removed.
Click and drag the box around what you want to keep.
To restore the background, select the image, click the Remove Background button, and click Discard All Changes.