These menu displays are wonderful toys when you get to use them (they're in every McDonald's in my city). Looking through all the menus makes you realize how many things you could do before to customize your order. I usually add extra patties to my burgers, add extra onions/lettuce, and then go to the "free condiments" section and order 5-10 peanut packages. All of which are happily placed on my tray without question, which is the only time I should interact with their employees: when I'm receiving my food.