This document discusses codes and conventions commonly used in film opening sequences. It outlines several techniques directors use to entice audiences and establish elements of the film in the opening, including showing studio logos, presenting titles and credits, establishing genres and characters, introducing themes/topics, using narration, sound, enigma, flashbacks, establishing shots, and action/chase scenes. The document provides examples of how each technique is typically employed in mainstream film openings to appeal to audiences and set up key aspects of the narrative.