When using the Navigation Screen this will show the View Screen.
Most of the tabs are the same as the New/Editing screen
Picked tab - will show the details regarding the stock that has been picked (location, Rotation (if not, specify)
Editing an Order
You can edit parts of a sales order at specific times, the timing is depending on the order status at the time you wish to edit.
Any order being picked by the warehouse can not have the order edited however you can still modify the collection details until the point of collection and edit the sundries with no limit on it.
Further details about editing the Collection / Sundries is found at the following link Editing a Sales Order
If you are editing the order itself then it is best to view the main sales order entry page for details about all the form fields.