[NTG-context] setupframedtexts

I guess I am getting a left margin when I enclose some text in a \framedtext and want to get rid of it. The manual gives as settable parameter "margin = standard,yes,no. However there is no visible effect when using "margin=no" in the setup. Inspecting the code for setupframedtexts I could not foun something like \c!margin. Is this an obsolete parameter? Or will it be implemented. yours sincerely, dr. H. van der Meer