The principle of continuity dictates that you apply the same design decisions you make for one aid to all of the aids you display in a speech. Businesses, agencies, and your college or university apply this principle to their websites and publications. Doing so maintains a consistent professional image and ensures that viewers don’t become distracted by a jumble of unrelated visual elements. Carry your choice of design elements—colors, fonts, uppercase and lowercase letters, styling (boldface, underlining, italics), general page layout, and repeating elements such as titles and logos—through each slide.