Add or edit the top navigation
The top Navigation displays top-level items of the site's structure.
Log in with your admin account > click on the Profile Picture on top-right > Administration > Design Studio > Header and Sidebar > hover over the Top navigation and click on the gear icon to edit.
From the Top Navigation settings:
Select one of the Presets styles.
Click on the Sections tab to open up the options for:
Logo - choose the size of the logo or disable it.
Actions - enable/disable options like Create post, notifications, search, main menu, etc.
Menu - add menu items to the top navigation. You can also add sub-menu items for a drop-down menu option.
Search box - change the search placeholder, select what members can search for, or hide the search option.
Mobile menu - customize the mobile menu.
Open up the Sub menu section to enable a sub-navigation menu. This will show as an extra row to show more navigation items.
Click on Save Changes at the top right of the window to save.