\setupinteraction[state=start]

\starttext

    \startplacefigure[title=A Dutch Cow A]
        \externalfigure[cow.pdf][width=3cm,frame=on,crossreference=yes]
    \stopplacefigure

    \startplacefigure[title=A Dutch Cow B]
        \externalfigure[cow.pdf][width=2cm,frame=on]
    \stopplacefigure

    \startplacefigure[title=A Dutch Cow C]
        \externalfigure[cow.pdf][width=5cm,frame=on,crossreference=yes]
    \stopplacefigure

    \page

    \placeregisteredexternalfigures[factor=max]

\stoptext
