David Trottier, also known as "Dr. Format," is best known as a screenwriting teacher, script consultant, and author of "The Screenwriter’s Bible," which is a comprehensive guide to writing, formatting, and selling screenplays. Trottier has sold or optioned several of his own screenplays, and he has become a respected figure in the screenwriting community due to his extensive knowledge of the craft and industry standards. His work is often characterized by its clear, instructive style and its emphasis on practical advice for both aspiring and experienced screenwriters.