Finding features of a poster

Much like last year, it was essential to find out the features of a poster so I could apply it to my work. It has been known that "Good artists borrow, but great artists steal", so understanding the composition of a poster could help me understand how I could create my own poster effectively. I have identified the main features of a movie poster below, which would benefit me when I am creating a poster myself (to enhance my understanding of the horror genre).