The document discusses the codes and conventions used in magazine design, specifically for classical music magazines. It examines various design elements like mastheads, images, text formatting, and layouts. For each element, it provides examples of how other classical music magazines commonly use that element, and how the magazine described in the document both conforms to and challenges some conventions. The goal is to create a magazine design that will appeal to an older, more sophisticated audience interested in classical music, while also incorporating some modern elements.