[NTG-context] Page number in outer margin?

I want to place the page number vertically centered in the outer margin, with some prettyprinting. Does one do this with the \setpagenumber command, the \inmargin command, or some combination thereof? I can figure out how to do it in plain TeX but I hate to revert to plain just for this feature. -- John Culleton Able Typesetters and Indexers http://wexfordpress.com