Elements of Cinema. (n.d.). Exposition. Retrieved from http://www.elementsofcinema.com/screenwriting/exposition.html
More often than not, a script’s length is not enough to make the characters fully complex and three-dimensional. This happens because the writer is pressed for time to keep the story moving forward and to follow the central plot without many digressions. Exposition, then, is used to add backstory and reveal something about the characters’ pasts that would otherwise be impossible. Exposition comes in many shapes and sizes. Some expand upon a character’s persona; others elaborate the story and some of its elements. The following section will go over the many types of exposition and when they are often used.