! Undefined control sequence. \starttext \rotate[rotation=90]{FOO} \stoptext system > tex > error on line 1 in file test.tex: Undefined control sequence ... 1 >> \starttext \rotate[rotation=90]{FOO} \stoptext \dodorotatenextbox ...ta \fi \dododorotatenextbox \wd \nextbox \if!!donea \s... \dorotatenextbox ...otatenextbox \@@rorotation #2} \hbox {\boxcursor \flushne... \dodowithnextbox ...xtbox \@@rorotation \!!counta \egroup l.1 \starttext \rotate[rotation=90]{FOO} \stoptext core-mis.mkiv: % We can completely do this in lua .. when 'I'm bored ... % \def\dododorotatenextbox % {\setbox\nextbox\vbox to \@@layerysiz % {\vfill % \hbox to \@@layerxsiz % {\dostartrotation\@@rorotation % \nextboxwd\zeropoint % \nextboxht\zeropoint % \flushnextbox % \dostoprotation % \hfill}% % \kern\@@layerypos}% % \setbox\nextbox\hbox % {\kern\@@layerxpos % \kern\@@layerxoff % \lower\@@layeryoff\flushnextbox -- luigi