Are you asking about the statement on the Dining Plan brochure that says at TS restaurants where you order from a menu you can:
*Ask your server about potential substitutions, but substitutions are not guaranteed. You will have to ask at each restaurant, but not all restaurants will allow a substitution and at the ones that do it will be something they have chosen in advance. Most often it has been a cup of soup, a small side salad or a veggie side dish. You will not be able to choose an appetizer from the menu.