Is it possible to change the default operation type from "Loading Operation" to "General Operation" when drag&drog an Manufactured Item to a system?

after drag&drop a manufactured item to a system(station), a loading operation will be created automatically. But we need to define operation steps in the created operation, it is not possible to create any operation under a loading oeration. so we need to use general operation.
My question is how to create a general operation not a loading operation after drag&drop a manufactured item to a system.