Hillis R. Cole & Judith Haag were responsible for the standard format that most studio screenplays were required to follow. Their seminal book, The Complete Guide to Standard Script Formats: The Screenplay defined screenwriting format for decades. With the advent of screenplay formating software, the Cole & Haag format has lost prevalence, but their book is still fundamental for serious writers who want to understanding the elements of screenwriting format. Among other important concepts, Cole & Haag introduce the idea of reading down the page. Their book also explains how each of the elements are properly used and provide variations that are not ordinarily part of the automatic formatting generated by screenwriting software.