Subtitles sit where they should
They were about a tenth of the picture too high — both the player's own subtitles
and the ones from addons. Each was permanently leaving room for the transport bar,
which is hidden almost all of the time.
That room is now made only while the bar is actually on screen. At rest the line
sits where virtually every other player puts it.
The position control actually moves them
"Bottom / Raised / High" barely did anything, and on the MPV engine it did about
half of the little it did elsewhere: the same stored number meant two different
distances to the two renderers.
It is one distance now, and the same on both. In the player's subtitle panel,
Monter and Descendre move the line ten points a press and show you where it
is. Réglages → Lecture → Décalage vertical does the same in larger steps.
Zero is the standard position. Positive lifts.