On Fri, Nov 07, 2003 at 04:58:08PM +0100, Andre Poenitz wrote:
> On Fri, Nov 07, 2003 at 04:55:46PM +0100, Samuel Hammer wrote:
> > Hi
> > does anyone know how to center an index under an reaction arrow ?
> 
> Whatever a reaction arrow is.
> 
> Something like $a\underset{x}{\to}b$ ?

Instead of the above, \xrightarrow[x]{} should be used.
In LyX, it is entered as \xrightarrow and then space (also, the 'Use AMS'
button in the document dialog should be enabled).

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