Supertitles are usually displayed using a supertitling machine. The text must be prepared beforehand as in subtitles. These machines can be used for events other than artistic performances, when the text is easier to show to the audience than it is to vocalise. Production of teletext subtitles A subtitle can refer to one of two things: textual versions of a film or television programs dialogue that appear onscreen, or an explanatory or alternate title, in addition to the main title of a work. ...
Supertitles contrast subtitles, the latter of which are used more often in film and television. In printed material In printed material, a subtitle is an explanatory or alternate title. ... Film refers to the celluloid media on which movies are printed Film is a term that encompasses motion pictures as individual projects, as well as the field in general. ...