Transport orders can be created with many different source document types. When making Transport Order manually, it basically works the same for all document types.
There is only one exception to this and that is the Worksheet Lines and filtering option..
Sales Order
Sales Return Order
Purchase Order
Service Order
Transfer
Warehouse Shipment
Sales Shipment
Return Shipment
Service Shipment
Transfer Shipment
Return Receipt
Be aware that the Sendcloud provider is not supporting all source documents stated in this list:
If you prefer to have a central place for the creation of transport orders you can create the transport orders via the transport worksheet and populate your sales lines to be processed with your specific filtering.
Worksheet Lines