Tumblr Narnia theme help..........?

[Barbara]

Hey
I recently installed the narnia theme 2, and I want a dash above the links on my main page (Like Home,Submit,Message) etc. How do i add a line above these words? I tried everything but i can't figure it out,
For example this tumblr : http://paradisiac-beach.tumblr.com/ has a little dash above the main links when you hover over them, how do I do that?

thanks

[Amy]

Its probably because its on the theme she's got, so you could always download that theme but just change the background colour and header?