If you want to invoice more than one shipment at a time, you can use the combined shipments feature.
Before you can create a combined shipment, more than one sales shipment for the same customer in the same currency must be posted.
The Combine Shipments batch job automatically combines shipments and creates invoices.
Open the Combine Shipments batch job request window.
On the Options tab, fill in the fields. For Help about a specific field, click the field and press F1.
For Help about fields on the other tabs, click the field and press F1.
Click OK to start the batch job.
Combine Shipments Batch Job