\environment columnsets-000

\definecolumnset[example][n=3,page=left]

\definecolumnsetspan[wide] [n=2,background=contrast,color=white]
\definecolumnsetspan[wider][n=4,background=contrast,color=white]

\starttext

\startcolumnset[example]

  \startcolumnsetspan[wider]
    wider: \dorecurse{2}{#1: \fakewords{25}{50}\par}
  \stopcolumnsetspan

  inbetween: \fakewords{25}{50}\par

  \startcolumnsetspan[wide]
    wide : \dorecurse{2}{#1: \fakewords{25}{50}\par}
  \stopcolumnsetspan

  after: \dorecurse{15}{#1: \fakewords{100}{200}\par}

\stopcolumnset

\stoptext