While many of PowerPoint’s SmartArt graphic variants are so usable, there may be times when you want to add an extra shape or two to your SmartArt — at this point of time, we are assuming that you already know how to insert a new SmartArt graphic or convert existing bulleted text to SmartArt. Fortunately, SmartArt allows you to make these additions and edits with just a click or two. You can add one or more shapes to your existing SmartArt graphics either from within the SmartArt graphic itself, or through the Text Pane. Whether you can add a new shape to a SmartArt graphic or not depends entirely on the SmartArt variant that you are using — some variants offer more options than the others.
Learn how to add new shapes to an existing SmartArt graphic in PowerPoint 2011 for Mac.

