I'm trying to learn `context`, and I'm satisfied with their capacities.

I read in  contextgarden that options of `\setupbackgrounds` inherit from `\setupframed`, but if I setup `toffset=5mm` for  `\setupbackgrounds[text][text][frame=on,toffset=5mm]` I have no effect? 

With `frameoffset` you can modify the four directions but how about a single direction?

Code

    \setuppapersize[A4]

    \setuppagenumbering[state=none]

    

    \setupbackgrounds[text][text][frame=on,toffset=5mm]

    

    \starttext

    

    \input knuth

    

    

    \stoptext