We already broadly explored Crop options in PowerPoint 2010. While you can do conventional cropping within PowerPoint, you can also decide to not crop within the typical rectangular constraints, and use another shape instead. This tutorial explains the Crop to Shape option that lets you choose non-rectangular cropping shapes for your pictures — the results tend to look like a picture has been contained within a shape.
Learn how to crop pictures using Crop to Shape option in PowerPoint 2010 for Windows.

