1. Segregate a Split Shipment from a Consignment
Which case?
A consignment has one or several split shipments. You can „release“ it from the split shipments to get it a regular consignment for immediate delivery. This creates a second consignment catching all the split shipments to the same address, awaiting fulfillment.
How?
In „Planning“ open the lane, then the Consignment (click on it).
Click onto the scissor symbol => that „cuts off“ the split shipment. If there are more split shipments in the consignment, repeat this.
M3 then creates an additional consignment on the same presort location.
Finally, book the new „split consignment“ to another presort lane and location, to avoid double booking on a sort position. Done.

2. „cut off“ into a Split Consignment…
Scissor
„cut off“ into a Split Consignment…
… and into a non-split Consignment…

3. Book to a new presort lane and location. Proposal: use a lane like OTH.