of each subtitle. These markers are usually based on timecode if it is a work for electronic media (e.g., TV, video, DVD) or on film length (measured in feet and frames). For cinema exhibition, this task is undertaken by a specialist or team of specialists.

The finished subtitle file is used to add the subtitles to the picture, either:
* directly into the picture (open subtitles);
* embedded in the vertical interval and later superimposed