You can add a border to a PowerPoint slide by adding a rectangle shape and removing the fill color, which will give the appearance of a border.

You can improve your PowerPoint presentations by both improving your presentation skills and making better use of the program ...

To manually crop a picture in Microsoft Word, Excel, or PowerPoint, select it, and in the Picture Format tab on the ribbon, click the top half of the split "Crop" button.

Create an Animated Aperture by Shape layer in After Effects. Hope this video useful for you. Don't forget like and subscribe.