private void tChart1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (zoomed)
{
MouseXUp = e.X;
MouseYUp = e.Y;
double max = lineSeries2.YScreenToValue(MouseYDown);
double min = lineSeries2.YScreenToValue(MouseYUp);
lineSeries2.CustomVertAxis.SetMinMax(min, max);
max = lineSeries3.YScreenToValue(MouseYDown);
min = lineSeries3.YScreenToValue(MouseYUp);
lineSeries3.CustomVertAxis.SetMinMax(min, max);
max = lineSeries4.YScreenToValue(MouseYDown);
min = lineSeries4.YScreenToValue(MouseYUp);
lineSeries4.CustomVertAxis.SetMinMax(min, max);
}
}