This document discusses common conventions used in horror film posters. It explains that posters typically feature the main characters, especially their facial expressions, to invoke fear or shock in viewers. Images of weapons and blood are also often used to signal danger. Cryptic messages, strange characters, and references to secrets or the unknown aim to spark viewers' interest and curiosity. Fonts, colors, layout, and other design elements are deliberately chosen to attract attention and fit the film's tone. Overall, horror movie posters employ frightening imagery and mystery to sell the film by triggering viewers' emotions.