Thanks to help that I’ve received in the forum previously, I already know how to fix the menu to the top or the bottom of the page. What I’m looking to do now is create the effect found at the following link:
Basically, you can do so by placing the navigation (#navigation) in the position of absolute (“position: absolute”). But it also depends on the theme you are using. To the theme you are using is not currently possible. Please check this article.