The document discusses various film opening conventions and codes that establish genre expectations for audiences. It explains that opening sequences aim to grab attention and indicate what genre to expect. For example, the opening of The Wolverine clearly uses action/adventure codes like explosions and fights to set up the hero vs villain plot. It also notes the purpose of studio and production logos in openings is to draw in fans of those brands and actors. Sound codes help convey genre through diegetic sounds that immerse audiences, versus non-diegetic music. Overall, openings aim to engage audiences and provide context to set expectations through visual and audio cues.