Thank you for your answer. I have tried to add POLYCONT function. data anno; length xc1 $ 15; retain drawspace "datavalue"; function="polyline"; y1=0.019; xc1= "class1"; output; y1=0.020; function="polycont"; output; xc1="class2"; function="polycont"; output; y1=0.019; function="polycont"; output; run; But then I add the following warning " WARNING: L'instruction DrawPolyline a des valeurs manquantes/incorrectes pour la position (X or Y). Instruction de tracé ignorée." I attach the data
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