Navigation → Documents → Processing → Sales Orders → Select Sales Order from List and Double Click to Open
If changes to the Qty to Process must be made follow these steps:
1. Select Document Lines tab.
2. Change the Qty to Process.
3. On top tool bar select the Generate Invoice from Sales Order icon or click Processing on top menu and select Generate Invoice from Sales Order.
4. Save using the save icon or CTRL + S or CTRL + Enter to save and close.