Two order creation modes
In the Portal you have two ways of creating orders: via create an order and via import an order. The first option is a step-by-step process (header, then content), whilst the second allows creating your order in one shot.
When you click on create an order a new window opens. From there you do your input in the Header and Content.
The second way of creating an order in the Portal is via the function import an order. Once the import is complete both header and content can still be amended.
For Unifield users, the advantage is that this import not only integrates the order lines into the content area but also automatically populates most of the header with the information that is already the PO file (PO reference, project code, description, etc.)