Folding is one of design`s often overlooked expressive devises. Folding a single sheet of paper imbues it with another dimension, and can change it in function as well. More than 250 examples of direct mail, cards and other familiar printed materials featuring simple/multiple folds, folding up, and insertion shown as they are effected by folding along with flat diagrams of their prefolded forms. The very reference material designers collect permanently preserved in a single volume.