Define the design as a full height for the menu item – https://take.ms/AdWxR, then see the width, padding and HTML Block – https://take.ms/0e0jI as a result you will have a similar dropdown as in the demo.
Also, to see the additional fields in the created menu item, you need to resave the menu after adding the new menu item.
Kind Regards
This reply was modified 5 months, 2 weeks ago by Luke Nielsen.
You need to resave the whole menu by clicking on the save button at the bottom, then when the whole menu is resaved, those additional fields will be shown.