Hi, With [https://gitlab.com/lilypond/lilypond/-/merge_requests/2010](https://gitlab.com/lilypond/lilypond/-/merge_requests/2010), I am proposing to introduce a better alternative to the font-name property for overriding the font of an individual grob.
`font-name` has numerous problems that make it a confusing user interface.
It defeats commands like `\markup \bold` and overrides like `\override
TextScript.font-series = #'bold`. If you want to change font styles while using
`font-name`, you need to do things like
```
\markup \override #'(font-name . "Linux Libertine O") {
Some words with
\override #'(font-name . "Linux Libertine O Bold") one
word in bold
}
```
instead of, with !2010,
```
\version "2.25.5"
\markup \override #'(font . ((serif . "Linux Libertine O"))) {
Some words with \bold one word in bold
}
```
It does not work to change music fonts for music glyphs like clefs (i.e.,
fetaMusic/fetaBraces). For textual glyphs like dynamics, it sort of works, but
the font size is off, as you can see from
```
\version "2.25.4"
{ c'\tweak font-name "emmentaler-20" ^\p }
```
When you override `font-name`, it applies to all font families. For grobs such
as text marks, it is desirable to leave (for instance) the typewriter font
unchanged when modifying the serif font.
Also, there is a common trap with `\override XXX.font-name = "Times New Roman"`
where “Roman” is interpreted as a font style. The solution is a trailing comma,
`\override XXX.font-name = "Times New Roman,"`.
`font-name` is something I would rather remove in favor of the new interface,
which solves all of these problems. However, because of all these
peculiarities, it is completely impossible to write a convert-ly rule for it.
What should we do here?
A. Keep it supported indefinitely. Reduce its existence in the documentation to
a footnote.
B. Remove it. Make convert-ly emit a “not smart” message and write clear
instructions to convert files.
C. Deprecate it now, remove it in 2.28.
Opinions?
Jean
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