This is a type of reverse callout box. Presenters typically use PowerPoint callout boxes to attach descriptive text to a graphic. The callout boxes look "heavy" on the slide, especially when there are a lot of them. This chart uses a different approach: a callout pointer from the graphic to the text. This slide looks much less cluttered and "lighter."
You can draw these pointers a couple of different ways:
- Use the freeform tool in the Shapes menu to draw a triangle
- Use a triangle from the Shapes menu and size and spin it to the right position.
If you want to add shadows to the different circles/levels, group the callout pointer and the circle and then apply the shadow. Grouping the pointer and callout pointer may disrupt your layering, so you may need to make some adjustments.
The image below uses callout pointers created with the freeform tool. Once they are created and colored, move them into place so that they point from the circle to the appropriate text as shown in the finished Power Chart.