Filmmakers use specific industry terms like "casting" and "props" instead of more generic words to seem professional. The text in a film depends on its theme and credits must be large and readable. Examples are given of common film terms like plot, set, prop, costumes, producer, and director. Credits in the film Iron Man are presented as an example showing associations and producers. Text is the most flexible way to present information on screen and convey ideas, but large blocks should be avoided. Subtitles help audiences understand dialogue and are useful for those with hearing difficulties. Credits and titles must have bold, easily readable text in a font and color that reflects the film's theme.