Where is the behavior controlled that allows manually changed pricing elements to be copied from the sales order to the billing document?

The ability to control the behavior of manually changed pricing elements being copied from the sales order to the billing document is determined by the condition type. Condition types define how pricing is handled for different transactions in SAP. They are essential in determining the conditions under which pricing elements are calculated and copied.

In the context of sales and distribution, condition types can be set up to specify whether manual changes made at the sales order level can be reflected in the billing document. This includes stipulating if conditions can be overwritten when transferring data from the sales order to the billing document.

Other areas such as copy control settings, billing types, or item categories also play roles in processing transactions, but they do not explicitly govern the behavior of individual pricing elements like condition types do. For instance, while copy control at the item level facilitates the transfer of data from sales orders to billing documents, it is the configuration of the condition types that specifically ensures manually adjusted pricing is taken into account during this transfer.