This document discusses the conventions used in magazine covers, film posters, and movie trailers. For magazine covers and posters, conventions include photos, graphics, fonts, and layouts designed to attract attention and convey information. Trailers use conventions like music, dialogue, camera techniques, editing, and sound effects to introduce characters, settings, and plot in a short time to generate interest. All of these visual media employ established techniques and formats to effectively promote and market their content to audiences.