[Theme: Thesis] Editing main nav menu width to display more pages

Hello,

I am currently working on a site (http://pdxstem.org/) that was designed by someone else, and it uses the “Thesis” theme. I’m really not a designer or developer, but can usually navigate my way around stylesheets, but alas… I cannot seem to find a way to fix the top nav menu.

I’m trying to get pages added to the nav menu. When I add pages to the menu, they drop down below the green bar, which looks bad, and the text is white so you can’t see them anyways.

I’m trying to find where I can alter the spacing between the menu items or set an allowed number of pages to display on one line, but can’t find it anywhere. I’ve tried widening the content space but it isn’t helping.

Let me know if you need more info… thanks for any advice you can give!

Dani