If you are selling products that require you to change the artwork before fulfilling the order then we recommend that you activate the manual approval workflow.
The order approval functionality allows you to upload custom designs after your customers place an order. All the orders placed by your customers are automatically set to the status "Pending Approval" and will require your approval to add the customized file before it is sent to print and shipped to your customers.
This is a perfect solution if you are selling products with customizations that require a designer to create the final design based on your customer's input.