Click Add displayed value to select a data field.
With Add Separator a user defined separator can be added here.
Delete displayed value deletes an entry from the list. The order
of displayed values and separators can be changed with the help of the arrow buttons.
Select the desired control type for your displayed values. In the selection list Insert Separator the insert of separators between the displayed values can be influenced.
Underneath you see a preview of the list that is generated on the basis of the settings you made for separators and displayed values.