## LaTeX forum ⇒ LyX ⇒ Macro in Lyx

Information and discussion about LyX, a WYSIWYM editor, available for Linux, Windows and Mac OS X systems.
bobred
Posts: 3
Joined: Fri Jul 15, 2016 4:05 pm

### Macro in Lyx

Hi
I am trying to get a macro that takes 2 argument and displays the derivative of x to order n. I type the following onto the Lyx page

`\newcommand{\diff}[2]{\dfrac{d^{#2}}{d#1^{#2}}}`

when I highlight and go to and press Ctrl+M I get a macro, that works. I would like a way that I can hide this macro, in the preamble would be good. I have tried copying the source code into the preamble but the macro doesn't work then.

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Stefan Kottwitz
Posts: 9568
Joined: Mon Mar 10, 2008 9:44 pm
Hi James,

did you manage to solve the problem?

bobred wrote: I have tried copying the source code into the preamble but the macro doesn't work then.

"Doesn't work" maybe, but it's not a problem description that we could work with. Any error message? Perhaps post a minimal working example. Either LaTeX export (for non-LyX users like me - LyX is just LaTeX with front-end ) or a .lyx file as attachment here.

Stefan