How do I add a page to the menu bar?
While editing a page, click the "Menu settings" tab near the bottom of the editor.
The "Menu link title" is the name that will show up in the menu bar. It does not have to match your page title, but it should still be descriptive and helpful. For instance, a page may be titled "Frequently Asked Questions", but for the menu title, you may only type "FAQ." We recommend keeping the menu title concise for both clarity and to save space in the menu bar.
To add a page to the main menu bar, set the "Parent item" to . To add a page to a submenu, set the "Parent item" to the page you want it to be listed under.
How do I edit existing menu items?
To edit the menu, go to Structure » Menus » Main menu. This will allow you to see an entire tree of the navigation menu of your site, which you can rearrange by clicking and dragging individual or groups of menu items.