After you have uploaded your files, we will check the artwork and you will receive an email from us that a proof is waiting for you. To approve or reject this proof, log in to My Account and click on "Check digital proof".
If you have checked the proof and this is how you want the artwork printed, then you are ready to approve. Read here on which points to check when looking at the artwork. You approve the proof by clicking the "Start production" button.
When you approve, the production process starts and you can no longer change the order or the artwork.