The procedure for adding an item to a sub-navigation menu, is very similar to that of adding a Main Menu item.
(a) Begin by scrolling to the very bottom of your basic page and locate the Menu Settings tab.
(b) Click on the “Provide a menu link” check box and the Menu link title field will automatically populate with your the title of your basic page.
(c) Best Practice: Enter information into the Description field. Information added into the Description field will be seen by users when they hovers their mouse over the menu item.
(d) Select the Parent Item dropdown menu, and you will be able to view all published content pages and menu items.
(e) Choose the desired menu location for your content item and click the Save button.