6.9. QuadMenu Search
The search element allows you to include a search form in the menu
To include a Search menu you have to make sure your menu location is activated on QuadMenu.
After you activate the menu location a new metabox, named QuadMenu Items, will appear on the menu editor sidebar.
If you expand this tab, you will see the advanced elements: Icon, Mega, Tabs, Search, Login, and Cart.