The Free Item section of internet options

In this section of internet options you can set for free items for online orders.

In the first box you can you can enter a spend and then if you click on the "..." it will bring up a list of you stock items and you can choose one or more.

In the second box it allows you to set up codes that the customer will need to enter at the end of an order. Then an amount that will need to be spent for the code to work. Then the days of the week that the code works on. Then the "..."  will bring up a list of you stock items and you can choose items for that code.