> Martin Oppegaard <mailto:martin.oppegaard@gmail.com>
> 11. August 2016 um 21:42
> Hi Wolfgang, thank you for the quick reply.
>
> Moving \definefontfeature before \setupbodyfont doesn't change anything
> for me. Here is the output of running context:
You need also "script=latn" when you enable oldstyle numerals.


You can use the mtxrun script to list the available features of a font
where you also see the necessary script:

$ mtxrun --script font --list --info fbbregular

resolvers       | trees | analyzing 'home:texmf'
mtx-fonts       |
mtx-fonts       | mapping   : fbbregular
mtx-fonts       | fontname  : fbbregular
mtx-fonts       | fullname  : fbbregular
mtx-fonts       | filename  : fbb-Regular.otf
mtx-fonts       | family    : fbb
mtx-fonts       | weight    : normal
mtx-fonts       | style     : normal
mtx-fonts       | width     : normal
mtx-fonts       | variant   : normal
mtx-fonts       | fweight   : conflict: regular
mtx-fonts       |
...
mtx-fonts       |
mtx-fonts       | gsub features:
mtx-fonts       |
mtx-fonts       | feature  script   languages
mtx-fonts       |
...
mtx-fonts       | onum     grek     dflt
mtx-fonts       |          latn     dflt



%%%% begin example
\starttypescript [serif] [fbb]
   \setups[font:fallback:serif]
   \definefontsynonym [Serif]           [file:fbbregular]
   \definefontsynonym [SerifItalic]     [file:fbbitalic]
   \definefontsynonym [SerifBold]       [file:fbbbold]
   \definefontsynonym [SerifBoldItalic] [file:fbbbolditalic]
\stoptypescript

\definefontfeature[default][default][script=latn,onum=yes]

\definetypeface [fbb] [rm] [serif] [fbb]    [default] [features=default]
\definetypeface [fbb] [mm] [math]  [modern] [default]

\setupbodyfont[fbb]

\starttext
ABC abc 1234
\stoptext
%%%% end example

Wolfgang