Note:
There are some choices for you in the link box.
And if you forget fill any box, you cannot create a new menu
Click to “Add”
The first, add a new menu item
The second, drag menu item which have added like this screenshot
In the end, you will have a per item of menu item. After, you only click to “Add new menu item to … ” to add per menu item.
From The4
Hope you success!!