[AUCTeX] Any fast ways to switch between inline and displayed math?

[Adam Johnson]

I didn't find them in AUCTeX, but it is nice and useful to have such 
features:

1. Change an inline equation $a*b + c*d$ to a displayed math environment, 
such as equation/equation*/displaymath/\[...\]/etc?  How about using the 
key, for example, C-c d (or C-u C-c i)?

I know this can be done by inserting an environment, but you need to select 
the region first and delete the $'s as well.

When I select $a*b + c*d$ and then insert an environment "equation", the 
\label was inserted after $a*b + c*d$ with a new line as below:
\begin{equation}
$a*b + c*d$\label{eqn:test}

\end{equation}

I prefer it looks like this:
\begin{equation}
\label{eqn:test}
 a*b + c*d
\end{equation}


2. Change a displayed math enviroment to an inline equation?  How about 
using the key C-c i (or C-u C-c d)?

This can change
\begin{equation}
\label{eqn:test}
 a*b + c*d
\end{equation}
back to $a*b + c*d$ with (all) the \label command(s) removed and if "//" 
exists, it will also be removed or replaced with some user-defined 
"delimeter", such as "\quad", ",", "\;", etc.

Thanks.

--
Adam

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