Hi,
Why up space and down space is not the same around each figure ?
Best regards,
Fabrice

\definecolor[FondTableaux][c=0.00, m=0.00, y=0.20, k=0.00]
\startsetups[table:initialize]
  \setupTABLE[column][1,2][offset=1ex,width=2cm]
  \setupTABLE[column][3][offset=1ex,width=10cm]
  \setupTABLE[row][first][background=color,backgroundcolor=FondTableaux]
  \setupTABLE[start][align={middle,lohi}]
\stopsetups
\starttext
\blank[big]
\startmidaligned
\bTABLE[setups=table:initialize]
\bTR
     \bTH  $a$ \eTH
     \bTH $\Delta$ \eTH
     \bTH Signe de $f(x)$ \eTH
\eTR
\bTR
     \bTD 1 \eTD
     \bTD   \eTD
     \bTD \dontleavehmode\externalfigure[cow.pdf]\eTD
\eTR
\bTR
     \bTD 2 \eTD
     \bTD   \eTD
     \bTD \dontleavehmode\externalfigure[cow.pdff]  \eTD
\eTR
\bTR
     \bTD 4 \eTD
     \bTD   \eTD
     \bTD  \dontleavehmode\externalfigure[cow.pdf] \eTD
\eTR
\bTR
     \bTD 6 \eTD
     \bTD   \eTD
     \bTD  \dontleavehmode\externalfigure[cow.pdf] \eTD
\eTR
\eTABLE
\stopmidaligned
\stoptext