In addition to the built-in templates, powerpoint 2007 has many built-in themes you can choose from. a theme is a predefined layout with selected fonts, colors and style. even though everything is already chosen for you in a theme, you are free to change any of its elements. adding a theme to your presentation is easy. click on the design tab. move your cursor over the icons in the themes group and you get an instant preview of a theme on your current slide. to see all the built-in themes available, click on the down pointing arrow and a dialog box will open. as with templates, there are more themes you can get from microsoft office online. once you decide which theme you want, just click on it. the theme is now applied. summarize the passage above. a. how to use themes when building templates. b. how to customize your template theme. c. how to add a theme to your presentation. d. all of the above