Backordering A Standard Sales Order -R12

Please follow the below process to backorder lines that are currently picked:

Navigator > Orders, Returns > Transactions (or the sales order can be viewed in quick sales and then the "ST" short cut can be selected in the tool bar)
Enter in the Sales Order number, hit tab on your keyboard and then click FIND
On the lines that are picked, enter a zero in the qty field (any order line that doesn’t have a zero will automatically be shipping in full)
Click the delivery tab in the bottom left of the window
Click the PACK button
Select the BACK ORDER ALL bubble for good measure
Then click ok
The lines will then be backordered, make sure to close any screens with the order open, and then re-open for the freshest view of the order possible.