Nikolai Weibull said this at Sun, 12 Jun 2005 21:02:45 +0200:

>> \startitemize[1 (or whatever symbol you want), 2*serried]
>
>I tried that, but the problem is that when one uses inmargin, this
>doesn’t seem to work.  It seems that the interplay between width and
>distance isn’t working as I would expect.  Anyway, thanks,

If it's in the margin, then you want to vary the margindistance. Of
course, that'll interact with other items you might have in the margin.
I'm not seeing another way to do it, at the moment.

\setuplayout[margindistance=.5em]
\showframe
\startitemize[inmargin] 
\item test \item test \item test
\stopitemize

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