How to Swap One Diagram for Another on Your PowerPoint 2007 Slides
If the diagram you chose initially doesn’t do the job, you can swap it for a different diagram. How successful the swap is depends on how far along you are in creating your diagram and whether your diagram is complex. Follow these steps to swap one diagram for another:
Click your diagram to select it.
Click the Change Layout button.
You see a gallery with diagrams of the same type as the diagram you’re working with.
Select a new diagram or choose More Layouts to open the Choose a SmartArt Graphic dialog box and select a diagram there.
You may have to click the trusty Undo button and start all over if the diagram you selected for the swap didn’t do the job.