Working With Orders
The purpose of fields on orders is to allow administrators to track extra information about an order. There are no instructions for printing fields on orders for this reason.
Admin use only
This app does not create form fields for your customers to enter data into about their order during checkout.
What You Can Do with Order Fields in Custom Fields
Store administrators can add extra information about orders and draft orders. Order fields may also be added to order notification emails for customers, or exported.
This feature is best used with the Chrome extension to allow you to update all order information from within the Shopify interface.