Dear Wolfgang, After changing the order, it works fine. Also, \startcontent … \stopcontent and \startcaption … \stopcaption are working too. Thank you for your help. Best regards, Dalyoung \useMPlibrary[dum] \usemodule[animation] \setupinteraction[state=start] \starttext \definepairedbox [mylegend] [location={bottom}] % width=10cm \startanimation {\startplacemylegend \startcontent {\externalfigure[dummy][]} \stopcontent \startcaption \input ward \stopcaption \stopplacemylegend} {\startplacemylegend {\externalfigure[dummy][]} { caption caption} \stopplacemylegend} {\startplacemylegend \startcontent {\externalfigure[dummy][]} \stopcontent \startcaption \input ward \stopcaption \stopplacemylegend} \stopanimation \stoptext