private void tabGraph_Paint(object sender, PaintEventArgs e)
{
PrepareBackBuffer();
// plotting in Long (as X) / Lat (as Y) coordinates
mapUtil.DrawMaps(e.Graphics, BackBuffer, BackBufferGraphics, MouseMoving,
checkIsRunning.Checked, comboMultiMaps.SelectedIndex, GetUnitsConversionCff(), GetUnitsName(),
PlotLong, PlotLat, Counter / Decimation, GetLineColor(comboBoxKmlOptColor), GetLineWidth(comboBoxKmlOptWidth),
checkPlotTrackAsDots.Checked,
Plot2ndLong, Plot2ndLat, Counter2nd, GetLineColor(comboBoxLine2OptColor), GetLineWidth(comboBoxLine2OptWidth),
checkPlotLine2AsDots.Checked);
}