The delivery data can be entered manually but can also be set
You can also automate the updating of your delivered quantity by 7.6.7 Scheduling "Update Delivery Data".
Additionally you always have the possibility to edit the quantity information at your pre-invoices manually.
Click Edit at the pre-invoice you want to change. Be careful with changing automatically filled-in fields. Navigate to your invoice items and click Edit at the item you want to edit.
Edit the Delivered Quantity
Scroll down to Quantity Information and manually update the Delivered Quantity.
Turn Linear Distribution on/off
If the checkbox Linear Distribution is checked, the values are calculated by the booked quantity and the duration (start and end date). If you uncheck this box the delivered quantity will be used. This checkbox defines if the amount is distributed linear or not. For instance, this is used selling fixed price products.