Order Number -Manual

Is it possible to have order number manual ? Yes ...It is possible .

Whenver we create a OM transaction type ,There is a document category created with the same name .We assign the document category to a document sequence to marry the transaction type and the document sequence .

If you need the order numbering to be manual ,You have to create the document sequence as Manual and when you assign it to the document category mark it as Manual.This would allow you to enter the order number manually by the user whenver this transaction type is used .