Here you decide whether you do not want to distribute ABC codes and only show the volume value per part, or whether to distribute ABC codes. If you select a distribution alternative, the volume value can also be shown as a total per ABC code. The available alternatives are:
Show total / ABC code
If you select a distribution alternative you can check the Total / ABC code box under the heading Show.
If you check this option, you can later choose the Show total option in the Info Menu (when right-clicking) in order to see the list as a total per ABC code. This can be very handy when working with large lists, in order to quickly get a general idea or outline of which volume value each ABC code represents.