To make an image transparent in PowerPoint, you have to change the opacity of the image - and you can do it for the whole image or a part.

Adding caption to images in PowerPoint is easy, and can be done in less than 1 minute. Learn how to add Captions to Pictures in PowerPoint.

If you don’t want the same rectangular pictures for your Microsoft PowerPoint slide show, create a custom-shaped picture placeholder and make it available to the presentation via a layout slide.