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.

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.

Learn how to create a Section Zoom and a Slide Zoom in PowerPoint. You can zoom in on a slide or picture during a presentation.