Change font case to lowercase in Menu descriptions

Hello,
The font for the menu descriptions is currently all uppercase.
When opening a large menu its hard to separate the description from the menu items.

Can you provide the code to make the menu descriptions lowercase please?
Can you provide the code to change the colour of the font for the lowercase too please?

Kind regards
Drew

Could you please provide me with a URL to your website, either here or via PM (click the “Private Message” text underneath my avatar) so that I may analyze it? It is a lot easier for us to diagnose issues when we have a live site to examine.