Hi,

I think \frac is resetting, or rather, that it sets to what one has set up, so:

\setupmathfractions
  [distance=bottom,
   bottomdistance=\exheight]

\startformula
  \frac{a}{b}
\stopformula

I hope it is what you look for.

/Mikael

PS You can find a bit on how fractions and other stuff are meant to be
used in the manual
https://www.pragma-ade.com/general/manuals/mathincontext-screen.pdf.

On Sat, Oct 12, 2024 at 4:10 PM <juliusross@gmail.com> wrote:
>
> Hi,
>
> For testing I would like to be able to adjust the font-based math parameters within ConTeXt MKIV.  I have been trying this
>
> \startformula
> \Umathfractiondenomdown\displaystyle=1em
> \displaystyle \frac{a}{b}
> \stopformula
>
> but the second command does not seem to have any effect on the output at all.     I am sure I am missing something, any help much appreciated.
>
> JR
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