Hey there,

the code that you're using won't work with \item command.
Use the \startitem ... \stopitem command pair instead.

Another way to get itemizations in columns is to simply place one itemizeation per column:

\starttext

  two columns:

  \startcolumns[n=2]
 
    \startitemize[packed]
      \startitem
        one
      \stopitem
      \startitem
        two
      \stopitem
    \stopitemize
   
    \column
   
    \startitemize[packed]
      \startitem
        one
      \stopitem
      \startitem
        two
      \stopitem
    \stopitemize
   
  \stopcolumns
 
  \blank[big]
 
  three columns:
 
  \startcolumns[n=3]
   
    \startitemize[packed]
      \startitem
        one
      \stopitem
      \startitem
        two
      \stopitem
    \stopitemize
   
    \column
   
    \startitemize[packed]
      \startitem
        one
      \stopitem
      \startitem
        two
      \stopitem
    \stopitemize
   
    \column
   
    \startitemize[packed]
      \startitem
        one
      \stopitem
      \startitem
        two
      \stopitem
    \stopitemize
   
  \stopcolumns
 
\stoptext

Cheers

Hello,
How to modify the code for an enumeration on three columns in a column ?
Thank you
Fabrice


\definemixedcolumns
  [Mycolumns]
  [
    n=2,
    separator=rule,
    rulecolor=,
    balance=,
    grid=strut,
  ]

\setupalign[verytolerant,stretch,hanging]

\setuppapersize[A4,landscape]
\setupinteractionscreen[option=landscape]

\starttext
\startMycolumns
\startitemize[n]
  \item
  \item
\blank   
\startitemize[a,columns,three,joinedup]  
\item
\item
\item
\stopitemize
\stopitemize
\stopMycolumns
\stoptext

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