Maximum of 3 characters (transaction code number or alpha code). Enter the transaction code number that you want to change. Only existing transaction code numbers can be entered. After the transaction code number is entered, the transaction code's description will be displayed.

The button can be used to open the Tcode Lookup window that allows you to view a list of transaction codes and select any transaction code by double-clicking it.

Right-clicking this field displays a shortcut menu that allows easy access to the Transaction Code program for adding or editing purposes.