why is this causing my osnap setting to go from rectangle to isometric, when I only want to lock the user into only drawing a line in the ortho direction. The OrthoMode is dim as a boolean and I am running this on acad2000. Set objViewport = ThisDrawing.ActiveViewport OrthoMode = objViewport.OrthoOn ThisDrawing.ActiveViewport.OrthoOn = True ThisDrawing.ActiveViewport = ThisDrawing.ActiveViewport EndPoint = ThisDrawing.Utility.GetPoint(CenterPoint, "Pick The Length of the Duct: ") thanks Kevin L.