General Transaction Sales Schedule Control Order

What are the three levels that copy controls are set up?   

@[email protected] | Updated 29 Dec. 2018

 And what are the transaction codes through which it could be done? At three levels of sales order copy controls are set up Header level, Item level and Schedule line level. • VTAA: from sales order to sales order • VTLA: from sales order to delivery • VTAF: from the billing document to sales order