[NTG-context] margins at a cover page

Hi, I think it is not appropriate to have a smaller left than right margin at a cover page. But my tries to achieve this are not successful. My relevant expressions: \setuplayout[header=0mm,location=middle] \definelayer[bild][x=0mm, y=0mm, width=\paperwidth, height=\paperheight] \setlayer[bild][]{\externalfigure[cover4a1.pdf][]} \defineoverlay[cover][{\placelayer[bild]}] \setupcolors[state=start] \starttext \setuppagenumbering[alternative=singlesided] \setupnumbering[place=] \setupbackgrounds[page][background=cover] \startstandardmakeup[doublesided=no] Gerhard -- Gerhard Kugler Psychotherapeut Bensheim (Germany) http://www.psychotherapie-kugler.de