Hello,

If you are referring to the prompts of the group by area, they can be set through the Promp1 and Prompt2 properties of the GroupByArea/Multi. Another way is to use the customization resource strings :

Customization Strings

Infragistics.Windows.DataPresenter.Resources.Customizer.SetCustomizedString("GroupByArea_Prompt1", "New Custom Prompt 1");

 Infragistics.Windows.DataPresenter.Resources.Customizer.SetCustomizedString("GroupByArea_Prompt2", "New Custom Prompt 2");