As of Release 4.0A, you have more flexibility with regard to all list displays relating to externally performed services. For example, you can include new fields, change the order of the fields in lists or create totals.
Furthermore, the following new list displays are available for external services:
You can find the listings via the "List displays" menu for the relevant purchasing document.
Furthermore, in the menu "Purchase order -> List displays -> External services -> By purchase order" you are offered the block "Purchase order selection" containing selection criteria relating specifically to purchase orders (e.g. validity start or end date).