At any time you can add or remove items from an order. This can happen if the buyer requests a change to their order for some reason like choosing the wrong variant.
Open the order that you want to edit and click
- Select the products that you want to add
- Select the variants that you want to add
- Set the number on each line to the quantity of items that you want to keep
- You get a preview of the price change
Your order is now updated.