Sorry that is not really what I want. I am looking to adjust (in context) all of the primitives \Umathfractiondenomdown, \Umathfractionnumup etc described on p138 of the LuaMetaTeX reference manual. Ideally it would be nice to be able to do this once from the start. The reason is simply it would be much faster than having to export the font each time I make a small change to the font (which is slow and so harder to see the effect of the change). If this is not possible/hard I can live without it. JR On Sat, Oct 12, 2024 at 11:36 AM Mikael Sundqvist wrote:

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 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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