Font Size Question

I just installed a new video card and I noticed that my font size in 
Netscape has gotten bigger. I am not referring to the font size in my 
Email or on web pages, but the font size onthe menus and the toolbars. 
How can I make these fonts smaller? I think I have tried changing 
Appearance settings in Display Properties and also I have played with 
the font sizes in Netscape Preferences. Any other thoughts?