The document discusses various codes and conventions used in film openings to attract audiences and establish genre. It explains that openings often introduce main characters, themes and narratives while hinting at the genre through visual and audio cues. Producers can use elements like lighting, color palette, music and more to imply genres like horror or comedy. Titles and credits are also used to identify actors and build anticipation. Narrative codes like action or enigma are employed to engage audiences and keep the story unfolding. Production logos provide insight into the scale of the film.