Using VB.NET, I created a function that will always start ArcMap with a certain Projected Coordinate System. By default, the Map Units and Display Units (Data Frame) are set to Meters, when using this Spatial Reference. How can I change the Display Units? I know how to change the Map Units to Kilometers (10), but how can I modify the code to change the Display Units? Dim dataView As IActiveView = My.ArcMap.Document.ActiveView dataView.ScreenDisplay.DisplayTransformation.Units = 10 dataView.Refresh()