Score testing

Range of the contrabass trombone:

${ \new Staff \with { \remove "Time_signature_engraver" } \clef bass \key c \major \cadenzaOn \ottava #-1 \tweak font-size #-2 fis,,,1 \finger \markup \text "poss." \ottava #0 c,,1 \glissando d'1 \tweak font-size #-2 f'1 }$

Hopefully I can get the Score extension working to produce SVG output, instead of the transparent PNG image that needs a white background styling for dark mode otherwise it's unreadable.

Unreadable Score extension output in dark mode