> Jose Luis Arellano <mailto:jose.4rellano@gmail.com>
> 10. September 2016 um 09:56
>
> For Math.
The \tf and \bf commands in math aren’t font switches like in text.

Most math fonts come only with a regular style which provides upright, 
italic, bold and bolditalic symbols but all of them part of the same 
font, only a few fonts provide also a bold style (which is usefull in 
sections) which comes also with upright – and sometimes bold – symbols.


\setupbodyfont[xits]

\starttext

\startformula
     {\tf xyz} \; xyz \; {\bf xyz} \; {\bi xyz} \quad
\mb {\tf xyz} \; xyz \; {\bf xyz} \; {\bi xyz}
\stopformula

\stoptext


Wolfgang