The document discusses various conventions and codes used in film opening sequences to establish genre and engage audiences. It explains that openings aim to grab attention and set expectations for the film's genre through visual cues and logical unfolding of events. Action films often feature explosions and fights to immerse viewers in high-paced action, while mysteries use enigmas and questions to compel viewing. Production logos from known studios signal likely large budgets and genres. Soundtracks also provide genre cues, with diegetic sound adding realism for genres like horror.