How can I change the products on an order?
At the present time, you will not be able to edit the products ordered on an order once it has been created.
If you want to add new products to the order then you'll need to create a new, separate order.
If you want to remove products from the order you can either add refunds to the order (described in our guide on managing orders) or you could cancel the order and create a new order without the products you want to remove.
We're currently working on our functionality for you to be able to change the products in an order and the feature will be released in the second quarter of 2017.