In SharePoint, the navigation links across the top of a website are referred to as the Top Link Bar or Global Navigation. While you cannot change these fixed links on a BVSD site, you may add links to the drop-down menus. If your website includes a navigation menu on the left side of your pages, in most cases the same links will also appear there.
All pages are automatically added to the Current Navigation (drop-down). What items are listed in the drop-down menu can be modified (add, delete, hide) with the instructions below. Additional links and headers can be manually added.
Add a link/header in a drop-down menu:Headers are different from links as they can be used in grouping pages/links.