hi list, new to `context' and my first question to the list: how can I achieve the following (`latex') behaviour: \newcommand{\km}{\ensuremath{K_m}} We can now use \km\ in the body text as well as in this \begin{equation} \km = 1 \end{equation} display equation. in `context'? I've tried something like \def\km{\math{K_m}} We can now use \km\ in the body text but get sytnax errors when putting it in this \startformula \km = 1 \stopformula formula. but this fails for obvious reasons (as would using `$$' instead of `ensuremath' in the `latex' case). so what I need is a way of defining (potentially complex) math-expressions via some shortcuts/definitions/macros/abbreviations (whatever) which I can then use in the formula environment (or whatever it's called in `context'...) as well as in the body text. any help appreciated, joerg -- Using Opera's revolutionary email client: http://www.opera.com/mail/