Could you define this in the preamble


%\unprotect
\defineitemgroup [Ex]
\setupitemgroup [Ex] [each]
[before={\blank[medium]\testpage[1]},after={\blank[big]},option={a,
columns,three,fit}]
%\protect

\startexercici[exercici:operacions-amb-fraccions-1]{suma i resta} Opereu:
\startEx
%\startitemize[a, columns, three]
...
\stopEx
\stopexercici


Good luck,

L. Montgomery


El mié., 23 de febrero de 2022 15:04, Xavier B. via ntg-context <
ntg-context@ntg.nl> escribió:

> On Wed, 23 Feb 2022 17:52:08 +0000
> Bruce Horrocks <ntg@scorecrow.com> ha escrit:
>
> >
> >
> > > On 23 Feb 2022, at 11:28, Xavier B. via ntg-context <
> ntg-context@ntg.nl> wrote:
> > >
> > > In my previous post [
> https://mailman.ntg.nl/pipermail/ntg-context/2022/105138.html], I don't
> know the reason, but the attached code des not display very well in mailing
> list. I put it here:
> > >
> > > \defineenumeration
> > >  [exercici]
> > >  [alternative=serried, before={\blank[medium]\testpage[1]},
> text={Exercici}, stopper={.\space}, width=fit, headstyle=\ss,
> distance=0.25em, width=fit, headcolor=exercici_color, title=yes,
> titlestyle=\ss, titledistance=0em, left={\bgroup\bf}, right={\egroup},
> after={\blank[big]}, prefix=yes, prefixsegments=section, way=section]
> > [snip]
> >
> > Removing "alternative=serried" gives a more grid like layout and
> (possibly coincidentally) the problem of the 'c' and 'h' labels being
> orphaned at the bottom of the page goes away.
> >
> > However the Exercici 1.3 heading is now too close to the end of the
> previous set. Perhaps changing your "before=" setting might improve things.
> >
> > This is on version 2022.01.10 08:36
> > —
> > Bruce Horrocks
> > Hampshire, UK
> >
>
> Thanks, Bruce, but removing alternative=serried is not an option.
>
> I don't understand that 'e' fits the space and 'c' doesn't.
>
> @Luis: joinedup does not produce changes
>
> In conclusion, I have the same problem ;-)
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
>
> ___________________________________________________________________________________
>