Graphical inventions of all sorts serve two distinct purposes [3]. Their first purpose is communication (a picture is worth of ten thousand words) and the second is to discover the idea by yourself. In both cases, visual representations produce cognitive amplification by, for example, extending a person’s working memory. We might imagine a stockbroker, watching computer displays of financial data, rushing to act on events. Whatever the activity is, mental work and perceptual interactions of the world are likely to be interwoven.