Hi Paul,
How about:

\version "2.20.0"

customFingering = {
  \override Fingering.font-name = "Arial Black"
  \override Fingering.font-size = #-1
  \override Fingering.color = #(x11-color "DarkRed")
}

cust =
  -\tweak font-name #"Arial Black"
  -\tweak font-size #-2
  -\tweak color #(x11-color "DarkRed") \etc

tune = \relative {
    %\customFingering
    c'4 d-2  e\3 % <= optional
    \cust-\markup\circle "3"
    g-5 %-\markup {\center-align \draw-circle #1 #.5 ##f }
}
\score {
    <<
    \time 4/4
    \new Staff \tune
    >>
    \layout {
      \context {
        \Score
        \override Fingering.font-name = "Arial Black"
        \override Fingering.font-size = #-1
        \override Fingering.color = #(x11-color "DarkRed")
        %Optional:
        \override StringNumber.font-name = "Arial Black"
        \override StringNumber.font-size = #-2
        \override StringNumber.color = #(x11-color "DarkRed")
      }
    }
}

Of course, you could also define a markup function to get a shortcut for
the circled fingering...
Cheers,
Pierre


Le mer. 24 juin 2020 à 15:19, Paul McKay <plm...@gmail.com> a écrit :

> Hi
> I'd like to put a circle round occasional fingering marks. I have tried
> *\circle*, but seem to have no control of the resulting thickness nor of
> the font features. I can find no way to customize the fingering font within
> the *\circle: *I always get some error message or other.
>
> I tried \draw-circle, but that's a kludge and I can't make it overlap.
>
> What I'd really like is to set up the fingering font attributes at the
> Score level so that I don't have to reset them every time I use fingering
> in a music expression. Perhaps that would encourage *\circle* to use
> them. In the following example, I'd really like to see a fingering on the e
> which has a bold red circle around it and properly centred. It would be
> good if it could handle tweaks to the Y-offset too because the circle might
> collide with other things.
>
> Thanks
> Paul McKay
>
> Example:
> \version "2.20.0"
>
> customFingering = {
>     \override Fingering.font-name = "Arial Black"
>     \override Fingering.font-size = #-1
>     \override Fingering.color = #(x11-color "DarkRed")
> }
> tune = \relative {
>     \customFingering
>     c'4 d-2  e -\markup {   { \circle \finger  "3" } }
>     g-5-\tweak Y-offset 5 -\markup {\center-align \draw-circle #1 #.5 ##f }
> }
> \score {
>     <<
>     \time 4/4
>     \new Staff \tune
>     >>
>     \layout {}
> }
>

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