Trying to alter/add top navigations to my Shopify "Classic" Theme.

[Tikvah Harrison]

Hello, I am all new to the Liquid Markup Language!

I am building a site using Shopify and would like to know how I can add small extra links to the very top portion of the page (By the search box) with "Instructions | Installations" like homedepot.com, I am familiar with HTML, CSS and have some Ruby and Rails experience. But this has been hard for me because I have no idea where I could access the "html" code of the page. 

Thank you and your help is greatly appreciated.