If you decide that you would like to change your Fulfillment Vendor, follow the steps below.
PLEASE NOTE: If you change your Fulfillment Vendor, you will need to set up your media, markups and style options again immediately after.
Open up your Site Manager, and select the Site Settings tab.
On the Site Settings tab, select Set Fulfillment Vendor.
Select the Fulfillment Vendor you'd like to use from the dropdown box.
Click the Change Fulfillment Vendor button, and your Fulfillment Vendor will change!