The printed book gradually assumed a form of its own. For example, this edition of the mathematical works of Euclid does not yet have a proper title page, only a sort of precursor. The printer started the text on the right-hand page, contained within a woodcut frame and with a running headline for a title. The many geometrical figures in the margins that neatly correspond with the text, and the structured composition of the book, make it an example of exceptionally skilful printing. The first two lines are in red ink, which was rather unusual for the time. The initials are decorated by hand in blue and red.