Graffiti Theory Photography. “SIGNAL! #one is a hybrid periodical that blends elements of a graffiti zine with those of an intellectual scholarly journal. The design has been influenced by everything from David Schmidlapp’s International Graffiti Times two-color hand-collage broadside, to Alan Benedikt’s 12ozProphet precisely gridded computer-aided layouts, to the avant-retro look of Rudy Vanderlan’s