This doesn't answer your original question, but why not \setuppagenumbering[location={footer,right},style=\tfx] instead of lengthy setups?
I will take a look at your sugestion. Thanks. As far as I recall page numbering isn't working with setups because I get two page numbers on every page.
(Btw: you should better use \switchtobodyfont rather than \setupbodyfont in case you need to change font size.)
Ok!
The following solution might not be the most elegant one, but I use similar approach for exact positioning:
\setuppagenumbering[location=] \definelayer [mypagenumber] [width=\paperwidth, height=\paperheight] \setupbackgrounds [page] [background=mypagenumber] \setlayerframed [mypagenumber] [voffset=\dimexpr(\paperheight-\makeupheight-\footerheight), preset=leftbottom] [width=\paperwidth,frame=off] {\tfx\pagenumber}
I'v tried it and I get a page number but only on one page, not all the document. Should I be taking a look at anything else to make it work an every page ? Sorry for my "newbie" questions... Thanks! Miguel Queirós