[NTG-context] multiple backgrounds

I'm playing around with layers and try to rewrite the letter style in a cleaner way. How can I use several layers as page backgrounds and switch them on and off independently from each other? With \setupbackgrounds[rightpage][page][state=start, background=logolayer] \setupbackgrounds[rightpage][page][state=start, background=senderlayer] the second background overwrites the first, but I can't define them together, because there could be several combinations of 5-7 layers. Grüßlis vom Hraban! --- http://www.fiee.net/texnique/ http://contextgarden.net http://www.cacert.org (I'm an assurer)