Adjust the Stroke Transparency property to control opacity from 0.0 (opaque) to 1.0 (clear), enhancing your design's visual impact....8 , 2.6 , 3.9 }, new [] { 2.7 , 3.2 , 0.8 , 1.7 });...Visible = false ; dataPoints [ 2 ]. Marker . Format . Fill . PresetTextured...