You use this window to view the details of a purchase document that you are going to send to your IC partner. Most of the fields in the window were copied from the IC purchase document (an order, invoice, credit memo or return order) when you posted it or clicked Functions, Send IC Document. (The menu item will vary depending on the type of document.)
For details about individual fields, see the Purchase Header and Purchase Line tables. You can modify the contents of some of the fields, such as the Description or Due Date fields.