standard flags, @code{'mensural} and @code{'no-flag}, which switches off
the flag.")
(font-encoding ,symbol? "The font encoding is the broadest
-category for selecting a font. Options include: @code{fetaMusic},
-@code{fetaNumber}, @code{TeX-text}, @code{TeX-math},
-@code{fetaBraces}, @code{fetaDynamic}.")
+category for selecting a font. Currently, only lilypond's system fonts
+(Emmentaler and Aybabtu) are using this property. Available values are
+@code{fetaMusic} (Emmentaler), @code{fetaBraces} (Aybabtu),
+@code{fetaNumber} (Emmentaler), and @code{fetaDynamic} (Emmentaler).")
(font-family ,symbol? "The font family is the broadest category
for selecting text fonts. Options include: @code{sans},
@code{roman}.")