A Fix will be available in LIB Version 2019.1.408 scheduled for April 8th.

Added new event: PenInitialized in the ChartTrackballController class. It can be used as follows:

ChartTrackballController controller = new ChartTrackballController();
controller.PenInitialized += this.Controller_PenInitialized;
...
private void Controller_PenInitialized(object sender, PenInitializedEventArgs e)
{
    e.Pen.Width = 6;
    e.Pen.DashCap = System.Drawing.Drawing2D.DashCap.Triangle;
    e.Pen.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDotDot;
    e.Pen.DashOffset = 50;
    e.Pen.StartCap = System.Drawing.Drawing2D.LineCap.DiamondAnchor;
    e.Pen.EndCap = System.Drawing.Drawing2D.LineCap.ArrowAnchor;
}

Regards,

Dimitar