How do I edit an order?
Visit the Admin, and click on the Orders (tab) along the top navigation

On the left column, use Search to find your order.

To visit this order, click on the order number link (shown here):

In the top-left area of the order page, click Edit. Here you can edit most of the content within the order.

The following screenshot shows the order details. Here you can configure options such as:
- name
- quantity
- price
- promotions & discounts
- additional SKUs
- special instructions
- and more

To save and finish, click Save Changes, which is located on the bottom right of the page.