You can assign jobs to nodes from the job screen in: Backoffice -> Dispatch: right frame.
(click to enlarge)
Select one or more jobs on the right, then:
select one node on the left side.
and click one of the [dispatch] buttons.
There are 3 dispatch possibilities.
Pickup.
Delivery.
Pickup and delivery.
The status of the shipment is changed into 'assigned' so that job lists or assignment orders can be send to subcontractors. See: About shipment status and actions