In the dropdown list box of List Editor, You can display two values corresponding to values and labels at the same time or display one of them. Display mode is specified through ListCellEditor.listItemDisplay property.
In the examples, two arrays below will be used as values and labels.
["Algeria","Albania", "Chile", "Colombia", "Denmark", "Finland", "France", "India"]
["알제리","알바니아", "칠레", "콜롬비아", "덴마크", "핀란드", "프랑스", "인도"]
If specify as true, the width of the main items will be displayed the same.
Delimiter displayed between Main and Sub items. (Set by checking)
Please refer to ListEditorStyles example about how to specify the color of the list items. Like specifying the sytle of the default item through listItemStyles, you can specify the style of the sub items through subItemStyles property separately.