Thank you Günter and Julien, you have helped me understand LyX better and
suggested good workarounds.
>> Thanks for the response Julien. I am starting to use math macros. But a
>> limitation of them is that I have to create them in LyX; they aren't
>> automatically generated when I import LaTeX files I have written by hand
>> (which I have a lot of!), and the result is a bunch of ugly formulas
I am fairly new to LyX. I have been disappointed to find that simple commands
defined via \newcommand and \DeclareMathOperator in the preamble (for example,
\newcommand{\sinc}{sinc}) appear as "evil red text" onscreen. In fact, they
look exactly the same as undefined (illegal!) commands. I go
