How to view custom theorem numbers in LyX

[Gunnar Lindholm]

If I use something like this, (a customized environment) 

\newtheorem{uppg}{Uppgift}[section]
\newenvironment{ug}{\begin{uppg}\normalfont}{\end{uppg}}

Can I make LyX show the counter number of each ug environment?

Gunnar.