A few more information:

For the 1st problem:

It seems that \setupitemize accepts two option groups, to which
n,packed and margin belong accordingly. However,
\setupitemize[n][margin=2em] does not seem to work.

For the 2nd problem:

\setupitemize[columns,one], although doing nothing in theory, seems to
fix the problem.

For the 4th problem:

I've found that we can do \setupitemize[A,text] which makes it like

    (A.) 0 (B.) 1 (C.) 2 (D.) 3

The problem now is, how can we remove the parentheses around the item labels?

On 07/09/2021, Sylvain Hubert <champignoom@gmail.com> wrote:
> Dear List,
>
> Here's a collection of four problems about item groups that I've just
> encountered.
>
> 1. 'n' and 'packed' not playing well with other options.
>
> This works:
>
>     \defineitemgroup[myitems][itemize][margin=2em,before=before]
>     \setupmyitems[n,packed]
>
>     \starttext
>     text
>     \startmyitems
>     \item 1
>     \item 2
>     \stopmyitems
>     \stoptext
>
> This does not:
>
>     \defineitemgroup[myitems][itemize][margin=2em,before=before,n,packed]
>
> This does not either:
>
>     \defineitemgroup[myitems][itemize]
>     \setupmyitems[n,packed,margin=2em,before=before]
>
> Is there a rule for this glitch which makes it worth memorizing, or is
> this just a bug?
>
> 2. 'before' not working in nested item groups.
>
>     \starttext
>     \startitemize[before=before1]
>     \item 1
>     \startitemize[before=before2]
>     \item 2
>     \stopitemize
>     \stopitemize
>     \stoptext
>
> Both before1 and before2 should appear, but only before1 is shown.
>
> 3. How to wrap the line under the bulletin or number?
>
> To be more precise, the current wrapping behavior of, say, "\item 0 1
> 2 3 4 5 6 7 8 9" is:
>
>     * 0 1 2 3 4 5 6 7
>       8 9
>
> How can we remove the indentation of the second line and make it like
>
>     * 0 1 2 3 4 5 6 7
>     8 9
>
> 4. How to put the items on the same line?
>
> That is, for "\item 0 \item 1 \item 2", I would like it to be like
>
>     * 0   * 1   * 2
>
> instead of
>
>     * 0
>     * 1
>     * 2
>
> My context version: 2021.03.05 19:11, texlive.
>
> Any help with any of the problems above would be greatly appreciated.
>
> Best,
> Sylvain
>
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