How to create an empty macro?

[Richard Kimberly Heck]

On 5/12/25 5:47 AM, Jean-Marc Lasgouttes wrote:
> Hi there,
>
> I tried to replace the example in section 6.9 Branches of the user's 
> guide by proper math macros, because the example as it is breaks 
> previews.
>
> So I would like to define
> \newcommand[1]{\question}{#1}
> \newcommand[1]{\answer}{}
>
> However, I cannot construct a math macro that does not use its 
> parameter. The parameter is automatically removed. Is there a way 
> around this?

Add the argument to the LyX box, and put \relax (or whatever) in the 
LaTeX box. Presumably, one wants some version of the content to show in 
LyX itself anyway.

Riki