Hello everyone,
How to insert more vertical space between the main items in the following
code ?


\def\point#1#2{$\bigl(#1\,;#2\bigr)$}

\def\vector#1{\vec{#1}}

\definemathmatrix
  [pmatrix]
  [left={\left(\,},right={\,\right)}]

\starttext


\startitemize[n][stopper={.},style=bold,color=darkred]

\item Les coordonnées du vecteur \math{\vector{AB}} sont :

\blank[formula]

\startitemize[a,columns,joinedup,pack,1*broad,four]
             [stopper={.},style=bold,color=darkred]

\item \math{\startpmatrix 2 \NR 1\NR  \stoppmatrix}

\item \math{\startpmatrix -2 \NR 2\NR  \stoppmatrix}

\item \math{\startpmatrix 3 \NR -3 \NR  \stoppmatrix}

\item \math{\startpmatrix -3 \NR 3 \NR  \stoppmatrix}

\stopitemize

\blank[formula]

\item Les coordonnées du vecteur \math{\vector{CD}} sont :

\blank[formula]

\startitemize[a,columns,joinedup,pack,1*broad,four]
             [stopper={.},style=bold,color=darkred]

\item \math{\startpmatrix -2 \NR 3 \NR  \stoppmatrix}

\item \math{\startpmatrix 1  \NR 5 \NR  \stoppmatrix}

\item \math{\startpmatrix 0  \NR 5 \NR  \stoppmatrix}

\item \math{\startpmatrix 5  \NR 0 \NR  \stoppmatrix}

\stopitemize

\blank[formula]

\item Les coordonnées du vecteur \math{\vector{p}=\vector{AC}+\vector{FE}}
sont :

\blank[formula]

\startitemize[a,columns,joinedup,pack,1*broad,four]
             [stopper={.},style=bold,color=darkred]

\item \math{\startpmatrix 3 \NR 3 \NR  \stoppmatrix}

\item \math{\startpmatrix -3  \NR 3 \NR  \stoppmatrix}

\item \math{\startpmatrix 3  \NR -3 \NR  \stoppmatrix}

\item \math{\startpmatrix -3  \NR -3 \NR  \stoppmatrix}

\stopitemize

\blank[formula]

\item Les coordonnées du point \math{G} tel que
\math{\vector{BG}=\vector{FA}} sont :

\blank[formula]

\startitemize[a,columns,joinedup,pack,1*broad,four]
             [stopper={.},style=bold,color=darkred]

\item \point{1}{3}

\item \point{3}{2}

\item \point{2}{3}

\item \point{1}{-4}

\stopitemize

\stopitemize

\stoptext