LaTeX.org

The only caviat is that I can't do But I can work around that for now, unless the fix is simple.

Cheers

You, sir, are a star.

Works like a charm; thank you very much.

I have a cunning plan for the document I'm working on but I'm having trouble implementing it...

I use several macros to define various constants etc for example
\newcommand{\xscale}{\tilde{x}}

Now, I want to put together a table where I define all of these.
For example;
\begin{tabular}{l l l ...