I'm using the tree menu as the main navigation for our website but I need to style it.

Now I found another post here that made reference to '.subCMSTreeMenuLink' and changing the background, so I used the css prefix 'sub' and added that class to my stylesheet. This worked and changed the sub items background colour.

I need to expand on this though and underline between links, make a left border colour etc etc. Can someone point me in the right direction? What other classes are there that I can use to style the menu?