Slide decks are a ubiquitous form of communication in both academia and business, and business communication instructors must be able to model and teach multimedia design principles. The literature regarding multimedia design has traditionally fallen into two camps: the cognitive school, focused on designing multimedia messages that accommodate human cognitive architecture, and the graphic design school, focused on using visual appeal as a tool for conceptual organization. I synthesize representative models from each school to provide theoretically derived and empirically supported principles for designing slide decks that are both well-organized and visually appealing.