The document discusses various frameworks for categorizing visuals based on their function and design. It outlines categories proposed by Levin, Alesandrini, Saunders, Braden, Rieber, and Clark, Lyons, and Hoover. The frameworks group visuals based on representational qualities, content, composition, medium, semiotics, and how they support learning. The document also provides examples of four key categories - decorative, representational, analogical, and organizational visuals - and discusses their pros, cons, and uses in instructional design.