> Aren't ledger lines printed as a singular stencil for the entire
> line? If so, it would make sense that the origin of the stencil
> aligns with the staff symbol. It would also mean there is only one
> grob to attach a balloon to.
Aah, ok. I didn't know that (or skipped or forgot a corresponding
discussion on our mailing lists if there ever was such a thing), and
it's impossible to find out with the existing documentation. The only
hint is that `LedgerLineSpanner` grobs by default live in `Staff` and
not `Voice`, ...
> Just the other day, I wanted to have ledger lines be printed in
> color to match the note head color. What I had to do was move the
> engraver from staff to voice so each voice could have its own ledger
> lines colored as I needed.
... as you have found out.
Werner
