PowerPoint has more than a hundred shapes but there are times when you want to combine two or more shapes to create your own shape. For example, we placed several basic shapes over a circle to create a smiling caricature as shown towards the left of the figure, below. With these shapes selected, we then used the Combine command that is explained later in this tutorial to create a unified, combined shape as shown towards the right in the figure below.
Learn how you can combine shapes in PowerPoint 2011 using the Combine command.

