You can make a picture transparent in your PowerPoint slides so that you can add text over it or use it as a background.

If you insert a lot of pictures into PowerPoint slides, you're going to love the new layout placeholders in PowerPoint 2007 and later.

This tutorial will show you how to create a stunning animated 3D Picture Cube in Microsoft PowerPoint - A cube that is bounded by six images.

Too many pictures in a presentation can be overwhelming. Here's how to turn a busy picture into a focused visual using Merge in PowerPoint.