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

I read in  contextgarden
<http://wiki.contextgarden.net/Command/setupbackgrounds> 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