Add new subtitle panel
Start in the Subtitles Panel by adding a subtitle "Track":
For each set of subtitles, I called them "tracks". But maybe that is confusing. In MLT I called them a "Feed". I am open to suggestions about this.
Name the track and specify the language:
Add subtitles with the buttons or the keyboard shortcuts:
The keyboard shortcuts need help. I chose a series of keys that are close to each other on the keyboard.
When subtitles are present, they will appear in the new subtitle bar in the Timeline:
To add subtitle overlay burn-in, add a "Subtitle Burn In" filter to the output. This filter is only available for the output - not clips or tracks.
Multiple burn-in filters can be added simultaneously - and they can each be burning in a different track.
But only one subtitle track can be active at once for editing: