I'm still trying to reproduce the layo-05.tex example Hans. As its code
is rather tortuous I studied other examples. Up till now this has been
quite a time investment without noticeable return, partly due to not
finding a comprehensive \*interaction* commands documentation to
guide me all along.

Therefore, I wanted to give it (and ConTeXt) one last chance by starting
from scratch and progress by trial and error.

Hence my previous question.

Alan

P.S. What I meant by texshow being a black hole is: there's a lot of stuff
in there, but for the most part (as a user) I don't have a clue what it is and
what it means.