The exporter is an element that stores all the needed information to export subtitles.
The exporter contains a list with the tracks to be exported.
Tags are used to specify the design of the subtitles, as well as the target formats.
An exporter can be used to preview subtitles in the monitor. This helps to see your subtitles exactly as they will be exported (WYSIWYG).
To use en exporter, display its context menu and select "use".