In most versions of PowerPoint you can also double-click your picture to launch the Format pop-up. Select "Rotate" from the list of options in the Arrange group within the Format pop-up.

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

How to Animate Pictures on Powerpoint. In PowerPoint, "visuals can speed learning and express meaning in ways that might be difficult or impossible to convey otherwise," say Dr. Stephen Kosslyn ...