What just happened?

You chose to display all the navigation links on your website at the top. When you preview the site, you can see that the four primary navigation links have moved to the top. You can't see any secondary navigation links yet, because your fledging website has only four web pages, all of which represent primary navigation links. But when you add subordinate pages later on, you know where they'll appear in your website's navigation scheme.

Why did I decide, on your behalf, to display the navigation links at the top? Why not on the left? Or a combination of top and left? The reason will become clear when we set the site width in the next chapter. For now, just set it to Top.