LyX ⇒ Proposition with 'beamer' Class

[delhaize]

I am beginner with LaTeX.

I used the template of beamer-conference-ornate-20min, when I scroll down the environment option bar at left top corner, I only have choices such as theorems, corollary, but what I need is proposition, how can I add this environment?

EnvOpts.png (2.89 KiB) Viewed 5929 times

I tried to put in the TEX environment the following, but it doesn't seem to work.

Code: Select all

\begin{propo}
\end{propo}

thanks for help

[Paul Rey]

Select: Block
in Tex field: {
(out Tex ield: Proposition
In Tex field: }
Regards