1. Add items to your basket by clicking the basket icon on each item that you wish to order.
2. Click the basket icon in the basket preview strip at the foot of the page, or click the basket counter in the top right corner of the page next to your login name.
3. On the Order page, follow the instructions: 'Please select a format/size for each item'. Under each item in your basket there is a dropdown menu that defaults to a size determined by the site owner. You can click on the dropdown menu and select another format/size if available. Not all items have all derivatives.