On 13 Sep 2023, at 07:47, jbf
When I come to bodymatter and Chapter 1, again it works, except that the positions of the languages are reversed, so I end up with vi on the left and en on the right. By Chapter 2 we are back to the correct position once more (en left and vi right). I want to know why this is happening, and if I can prevent it happening.
I've modified the sample code you got from Wolfgang to include chapter headings and it all looks fine to me[1] - the red text is all on the right hand side and the greeen text is all on the left. If this doesn't help and you still have problems then you'll need to post a sample that actually shows the problem. I'm using ConTeXt ver: 2023.09.04 19:15. \starttext \startoutputstream[one] \startcolor[red] \dorecurse{5}{\chapter{Stream One} \dorecurse{10}{\input knuth\par} } \stopcolor \stopoutputstream \startoutputstream[two] \startcolor[green] \dorecurse{5}{\chapter{Stream Two} \dorecurse{10}{\input zapf\par} } \stopcolor \stopoutputstream \synchronizestreams[one,two] \setbox\scratchboxone\outputstreambox[one] \setbox\scratchboxtwo\outputstreambox[two] \doloop {\ifvoid\scratchboxone \exitloop \else \setbox\scratchboxfour\vsplit\scratchboxone to \textheight \vbox to \vsize{\box\scratchboxfour\vss}% \setbox\scratchboxfive\vsplit\scratchboxtwo to \textheight \vbox to \vsize{\box\scratchboxfive\vss}% \fi} \stoptext [1] Apart from unnecessary blank pages at the beginning but that's a different problem so I'm not addressing that for now. — Bruce Horrocks Hampshire, UK