[NTG-context] using two columns on a poster (\setlayerframed)

Hello, this is probably the most trivial question, but I'm still confused: how can I use two columns inside \setlayerframed? \startbuffer[abstract] \startcolumns[two] % doesn't help \input tufte \input tufte \stopcolumns \stopbuffer \definelayer[paper][width=\paperwidth,height=\paperheight] \setupbackgrounds[page][background=paper] \setlayerframed[paper] [preset=lefttop,hoffset=.05\paperwidth,voffset=5cm] [width=0.9\paperwidth,align=normal,offset=5mm] {\getbuffer[abstract]} I would be grateful for any hints, Mojca