This behavior is used to create a button to remove products from the cart. This behavior must be applied to a button that is inside a Cart Repeat Region.
In this combo you will find all the button element in your page and you must select which button you want use to remove the product from the cart.
In this combo you can find only the button with TYPE="BUTTON", submit and reset button excluded. If the button you select is not inside a Cart Repeat Region an alert message is displayed and the button is not created because the button must have the reference of the item you want remove and the cart get this reference from the repeat region index.