Hi,
looking at the output of
\setupbodyfont[libertinus]
%\setupmathematics[stylealternative={ssty}]
\starttext
%\addff{ssty}
$y'=f'$
\switchtobodyfont[newcomputermodern-book]
$y'=f'$
\stoptext
I think that the primes in libertinus are too small. Indeed, looking
in the font, they look like the output. In lualatex* I get larger
primes, and as far as I understand it is because unicode-math enables
ssty.
I was not able to do so with \addff{ssty} or with
\setupmathematics[stylealternative={ssty}]. What do I miss?
Best regards, Mikael
*The file I used in lualatex was this:
\documentclass{article}
\usepackage{fontspec}
\usepackage{unicode-math}
\setmathfont{LibertinusMath-Regular.otf}
\begin{document}
$u'f'$
\end{document}
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