A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
erwetzel,
Select your picture, on the contextual tab format, in the picture style group, click picture shape button, choose the rounded rectangle. Adjust the rounded corner by using the little yellow diamond shaped that appears.
Off course you can use the picture styles on the same format contextual tab also , some rounded corners there. Other effects that go with the style you can easily turn off.
Luc Sanders
MVP - PPT