The Orders section is possibly the most important section to understand. This section holds of all your Orders, Quotations, Order Forms, Pro Forma Invoices, Invoices, Receipts, Refunds, Credit Notes, and Statements.
An order is defined as a working document which holds all the information used to send your customer a Quotation of Invoice.
The Order is always open and editable whereas the generated document (Quote, Order Form, Pro Forma Invoice, and Invoice) is a non-editable document with a history of generation attached to it.