A submenu (drop down menu) allows you to nest up to 15 submenu items under a single menu item.
A submenu creates a new top-level menu item under which you can then add more submenu items. Existing menu items can’t be used as submenus, so you’ll have to set up new ones.
To create a submenu, use the Add a submenu button at the bottom of the menu editor. Once you’ve named your submenu, you can proceed to add links by clicking on the Add a new link button directly under your newly created submenu.
You can reorder submenu items just like any other menu - simply drag and drop the items into the desired order. Using separators is also possible.