I'm trying to replicate an effect in my development system a previous developer created in a navigation menu. The menu options display as level 1 and level 3; no level 2 is displayed. In admin, looking at the menu there is a box perhaps a third of the height of other menu items between level 1 and level 3. Obviously this box is a placeholder that provides the extra level of indentation. I cannot, however, figure out how to create it.
The effect can be seen in the Impact menu item at Tahoe Truckee Community Foundation
Your help is most welcome. Thanks.