Category Menu - Showing More Than 10 Results

I'm using the Category Menu to show all articles in a category. However, there doesn't seem to be an option to show 'Number of Result' - it's stuck at 10. Example:

www.terminateshere.co.uk/index.p ... &Itemid=29

I prefer slightly longer lists, say 20 to 25.....is there any way I can change the number of results? I've tried digging round the template php files, but I can't find where it decides it's going to deliver 10 results.

You can change this in the the category-parameter (Parameters: Layou common / first entry: # per page ...).

Thanks - didn't think of looking there.