<ig:XamGrid.DeferredScrollingSettings> <ig:DeferredScrollingSettings AllowDeferredScrolling="Default"> <ig:DeferredScrollingSettings.GroupByDeferredScrollTemplate> <!-- DataTemplate を追加します --> </ig:DeferredScrollingSettings.GroupByDeferredScrollTemplate> </ig:DeferredScrollingSettings> </ig:XamGrid.DeferredScrollingSettings>