As of Release 3.0, multi-level lists are available in addition to the previous selection lists for notifications and orders.
Via a filter, the user can determine which additional data they want to see in the list together with notification or order.
The selection results are displayed in a hierarchical list where you can choose the fields which are to appear in the list for each category of data via Settings.
For notifications this is:
For the order this is:
R/3 Customizing Implementation Guide (Notifications)
R/3 Customizing Implementation Guide (Orders)