Hi Alexander,

You'll have to change the graphics transform - for example:

public override void OnAfterPaint(NPanel panel, NPanelPaintEventArgs eventArgs)
{
 string label = "test";
 var yStyle = new NTextStyle(new Font("Arial", 12), Color.Red);
 yStyle.Orientation = 90;

 GraphicsState state = eventArgs.Graphics.DeviceGraphics.Save();
 NPointF location = new NPointF(100, 100);

 eventArgs.Graphics.TranslateTransform(location.X, location.Y);
 eventArgs.Graphics.RotateTransform(90);
 eventArgs.Graphics.PaintText(label, yStyle, new NPointF(0, 0));
 eventArgs.Graphics.DeviceGraphics.Restore(state);
}