Once both parties ( you and your buyer or you and your seller ) have every customization subject confirmed, there will be an additional button "Request Create" appear in the tool bar on the buyer side.

When the buyer click on this button, this customization request will be officially created on the Seller side. Seller will be able to see a Create Product button in this tool bar. After clicking on this button, the Product Display window will appear for Seller to inspect the content from the buyer’s point of view.

If everything is correct and in place, seller can click on Save button and this Customization Request will then turn into a product which only the creator can initiate a purchasing order. If you wish to place an order of this item, you can click on Add into Shopping Cart and add this item directly into a shopping cart.