[TYPO3-RTE] RTE sourcecode display

[Mike Morris]

Hi all,

is it possible, whenm RTE is in sourcecode display mode,  to make the text 
to be displayed in a different font and size?

I would like to make the RTE sourcecode to be displayed in more clear font 
like courier and the font size should be bigger.

Where can I modify this?
I think it is CSS, but where to start?
Anybody modified this already?

Thanks