Gather some samples of circle graphs. Past presentations or files should contain plenty of examples for you to view. Your employer might also be able to provide you with some options.
Read the titles of the various circle graphs. You can create a straightforward title that only reveals the topic, such as "Employment Rates in Texas," or you can choose a more descriptive title that says something about the data being presented, such as "More Texans are Falling Below the Poverty Line."
Check out where the information can be written for the sections of the circle graph. The information can either be written within the sections or directly outside of the corresponding sections. If your circle graph has very narrow sections, writing outside the section might be more appropriate.
Consider adding the percentages for each section. Some circle graphs might just let the size differences of the section reveal the data, while others include the percentages for each section. This is more helpful when some sections are very close in size.
Look carefully at how each section of the circle graphs are differentiated. They will likely always be differentiated by at least a solid line. However, each section can be a different color, have a different pattern or both. Note that patterns and darker colors make it more difficult to write section information within the circle.