Subtitles are a common tool in the motion picture and television industries. In silent movies, subtitles are a form of exposition and of presenting dialogue. Motion pictures screened for a non-native audience use subtitles to present dialogue in the given audience’s language. Alternatively, subtitles may also be used to present short passages of dialogue not spoken in the film’s main language. Subtitles generally appear along the bottom of the frame and tend to present a somewhat condensed version of what is actually said. The latter is done for space reasons and also to allow the subtitles to keep pace with the visuals. In the context of copywriting, a subtitle is the secondary title that helps explain the main title.