There are two cases to discuss. ### Using \newcommand in the the LyX document preamble.I get this behaviour: 1) new document 2) write this in preamble: \newcommand{\mycommand}{ciao} 3) create math inset (equivalent of $\mycommand$). math is properly rendered 4) change the preamble in \newcommand{\mycommand}{ola} At this point, should the rendering change? Nothing changes for me.
I am confused. What do you mean by 3) ? I type $\mycommand$ in the document. Of course it is rendered as an unknown tex tag on screen, but rendered correctly in dvi/pdf output. If I change the preample the screen view does not change, but the pdf/dvi output does.
Stefan
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