042: Thou shall not use CAPS for long passages of body copy

Commentary We’ve already discussed in Rule #9 the importance of keeping the typeface simple in order to ensure the legibility of long passages of text. However, with even just one typeface employed, it’s still easy to create difficulties for the reader by setting all the text in uppercase. It’s universally recognized (and much research has been done on the subject) that mixed lowercase and uppercase blocks of text are easier to read than all uppercase. This is primarily due to the fact that, despite uppercase text appearing larger when set at the same size, it has no ascenders or descenders. As such, the lowercase letters have more variation in their appearance and are therefore easier to recognize, speeding up the process of reading. Another key po....PD