Thread: Creating Sub Menu

I am trying to learn the basics. It appears simple to create a menu using the navigation bar. BUT how does one create a sub menu? Ie In most larger sites when you mouse on a menu heading/item, a drop down sheet of sub headings appears, each one connected to a page in the site. How to do this in Bluevoda please?

This is the menu bar feature instead of the nav bar. It is in the same toolbar.