Experiment with different font colors to see what best fits your requirement. Not only can you use the center and sides of the circle as placeholders for text - there are small horizontal sidebars on either side of the singular circles on some slides. Some slides contain 3 circles so we did away with the horizontal place holders to create breathing space and avoid crowding the slide with too many graphics. Download this Editable PowerPoint at http://www.24point0.com/ppt-shop/circular-diagrams-editable-ppt