For my last year of bachelor's, I wrote a small thesis about the use of graphic and illustrative title screens in movies. I mainly analyzed Saul Bass' opening credits and added references from the rest of the movie. I made a lot of comparison to greek theater : the graphic title screen announces what will come just like the narrator does at the start of a greek play. I also put a lot of emphasis on the creation of the visual and sound identity of the movie that emerges from the title screen. The spectator, when they watch the opening credit, knows what the genre of the movie is and what makes it unique.