A menu item is anything that can be sold to a customer. Pizza, drinks, and promotional merchandise are examples of menu items.
A modifier (or choice) is an item in your restaurant that is not sold on its own, but is added to a menu item that is sold.
A pepperoni modifier node.
For example, pepperoni would be considered a modifier, because it is not sold on its own, but added to other items that are saleable, like a pizza or sandwich. Modifiers are not limited to food items. Anything that can be added to a menu item is considered a modifier. This includes food packaging items.
Menu items and modifiers are represented on the Menu Tree as Item/Modifier nodes. 
Every item or modifier that you want to appear on your Terminal menu must have an Item/Modifier node in the Menu Tree.
To help you add menu items and modifiers to your menu, we have created two tutorials for you to follow:
•To learn how to add an item to your menu, view the Adding Menu Items SpeedStart Tutorial 
•To learn how to add modifiers to your menu, view the Adding Modifiers SpeedStart Tutorial
See Also:
