A Z-Fold brochure is analogous to a trifold brochure, the only real distinction remaining the folding direction of the last panel. The z-fold is one sheet of paper folded into a few panels (over the front as well as the back again) that are folded inside of a “Z” path. https://juliuspkbrj.wikiexpression.com/3381281/the_5_second_trick_for_flyer_printing