[NTG-context] I would like to have footnumber 4

Dear List, I have a little example. \setuppapersize[A4] \setupinteraction[state=start] \setcounter[userpage][100] \setupbodyfont[modern, 12.50pt] \starttext Das bin ich \footnote[Das auch]{Hier bin ich} \stoptext I would like to have footnumber 4 on this page. How can I do that? Many thanks Uschi