Enlarge Image at The Presentation

Often when doing a presentation, you may want to enlarge the image using Emphasis: Grow effect in PowerPoint 2002/XP and above. You may want to show a clearer view of a photograph. But enlarge the Grow effect often ends up getting blurred images/jagged. It looks ugly, you will not want to show others that were enlarged but poor quality picture, right?When entering the picture, it's up to the size