On Thu, Jul 10, 2003 at 05:10:17PM +0300, Amir Seginer wrote:
> Hello,
> 
> I've just been trying use the command \xrightarrow with it optional 
> argument, e.g.
> 
> \[ leftside \xright[down]{up} rightside \]

\xrightarrow is supported 'natively'.

Just make sure to enable AMS.

> Is it possible to do this (and in general use optional arguments in 
> math/display mode)? I've tried writing it as regular text (without the 
> \[ and \])

Write it with the \[...\] and it should work.

> and turning it to a math/display mode. I've also tried to 
> insert it manually in the .lyx file, but to no avail.

Even that should work.

> If it is indeed imposible, might it be better if there was an option 
> within math mode to enter pure latex, without Lyx "helping" in the 
> middle.

Even that work.

> Something like the ERT box in the regular text. I think  (if I 
> remember correctly) that it was possible in earlier version 1.1.6 (or so).

It still is.

> I'm using Lyx 1.2.1 (Xforms)

Brr... I think it should work there, too, but I've not checked.
Especially the native xrightarrow support might be a 1.3.x feature.

Andre'

-- 
Those who desire to give up Freedom in order to gain Security, will not have,
nor do they deserve, either one.     (T. Jefferson or B. Franklin or both...)

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