[NTG-context] \tab inside layer?

Dear list, I have this minimal sample: \definelayer[MyLayer][state=start] \setlayerframed[MyLayer]{\tab{one} tab\\ \tab{another} tab} \setupbackgrounds[page][background=MyLayer] \starttext \input knuth \stoptext Is there no way to get a tabular space within a layer? Many thanks for your help, Pablo -- http://www.ousia.tk