Jose Luis Arellano
29. August 2016 um 00:45
Thanks Wolfgang,

For now, am using this work around to get italic in maths:

\definefallbackfamily[mainface][math][Minion
Pro][tf=style:italic,preset=math:lowercaseitalic]

I have another couple of questions:

1) I am using a font that have the feature onum enabled by default, so
how can i unset this feature for math (lnum,tnum)?
You have to create a font feature where you change the number style and apply it with the features key.

\definefontfeature[mathdigits][default][mode=base,onum=no,lnum=yes]

\definefallbackfamily [...] [mm] [...] [preset=math:digitsnormal,features=mathdigits]

2) Is there any way to use only some symbols like +, - from Minion
Pro in math mode?
You can select certain characters with the range key but you have to know the unicode numbers.

\definefontfamily     [mainface] [rm] [Minion Pro]
\definefallbackfamily [mainface] [mm] [Minion Pro] [range={0x002b,0x2212}]
\definefontfamily     [mainface] [mm] [TeX Gyre Pagella Math]

\setupbodyfont[mainface]

\starttext
\m{12 + -3}
\stoptext

Wolfgang