PowerPoint’s adjust picture options enable you to customize inserted pictures in your slides in many ways. Additionally, PowerPoint also provides you with a collection of preset Picture Styles, which can be directly applied to any selected picture. Picture Styles are somewhat similar to the Shape Styles since they take just a single click to provide the selected picture with a great look –but, that’s where the similarity ends. Because the Picture Styles are not Theme specific. They just make the picture stylish by applying a border, changing the frame shape, or, by adding some 3-D effects.
Learn how to apply preset Picture Styles to your pictures in PowerPoint 2011 for Mac.

