Open your HTML file in a text editor. Ensure that the divider for the navigation bar, identified with a tag, is located directly following the divider for the header.

By default, the navigation bar stops rendering after the last link displays. You can use the CSS "height" property to force the navigation bar to extend to the bottom of the page.

Most navigation bars on websites are horizontal. The navigation bar can be made horizontal by using the following CSS: ...

Items are automatically added to your horizontal navigation bar as you create top-level pages. Unlike a vertical navigation bar, there are limitations to the number of top-level links you can include ...