Unfortunately, I haven't used NS since 6.2, and I honestly don't remember if there's a user-accessible setting for this - I don't think there is - so the only advice I can give is the not-very-helpful "switch"... ;)
I think you're right; the menus aren't as deep and detailed as IEs or MSs usual offerings. But the GUI is so nice and the v7.1 is as fast or faster than IE, at least on my machines.
Thanks again for the assist of IE, g_r.