Under Product Management > Product Arrangement or Order Management > Pick Up Goods, you are able to select a certain product and ask a seller for customization by choosing customization in the tool bar.

When Product Customization window opens, you will see three sections, the status list on upper left ( tells you how much customization is in process and the status and the corresponding trading partners list ), customized product list on upper right ( when you click on a number in the status list and customized message represented by the number will appear in this area for your choice ), the message editing area at the bottom.

Message editing area is divided into three parts: basic product information area on the top, customization conditions in the middle, discussion at the bottom.