> Jose Luis Arellano <mailto:jose.4rellano@gmail.com>
> 29. August 2016 um 23:22
> 2016-08-29 18:02 GMT-03:00 Wolfgang Schuster<schuster.wolfgang@gmail.com>:
>> Do you use Minion Math?
> No, am using another commercial font (Fedra Serif B Pro) without math
> support and \definefallbackfamily.
You last example was misleading because you tried to change the features 
of the math font.
>> Does this work (untested)?
> No.
> This is what am using:
>
> \definefontfeature[default][default][tnum=yes,lnum=yes]
> \definefontfeature[mathdigits][default][mode=base,tnum=yes,lnum=yes]
> \definefontfamily[mainface][serif][...]
> \definefallbackfamily[mainface][math][...][preset=math:digitsnormal,features=mathdigits]
> \definefontfamily[mainface][math][DejaVu Math]
> \setupbodyfont[mainface,10pt]
>
> \starttext
> 0123456789\par
> \m{0123456789}
> \stoptext
>
> You can see the result in the attached PDF.
I can reproduce it with one of my fonts but have no solution for it.

Wolfgang