Reading is a complex process whereby we identify and transform a written message into meaning so that we can respond to it. How do we evaluate how easy a piece of typography is to read? Investigations by psychologists into reading can identify the factors that make type legible under different circumstances, and suggest the best solutions to facilitate reading. Designers and psychologists working together can focus on user needs and, through iterative design, develop the most appropriate solutions. ‘Making typography legible’ explains the guidelines for legibility. There are several variables that affect legibility: the relationship of line length to line spacing, the arrangement of type, and the choice of typeface.