Hello,

           i am using ultraDataChart. i have isue with zooming scale. zoom is working great without margin.

if add margin (top,left,bottom,right) then zoom is not reflecting the correct value on chart. 

namespace Zoom
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
try
{
AddSeries();

Data_Chart.PlotAreaMarginTop = 5;
Data_Chart.PlotAreaMarginBottom = 5;
Data_Chart.PlotAreaMarginLeft = 5;
Data_Chart.PlotAreaMarginRight = 5;

for (int i = 0; i < 11; i++)
{
DataPoint NewDataPoint = new DataPoint();
NewDataPoint.X = i;
NewDataPoint.Y = i * 5;
DataPoints.Add(NewDataPoint);
}

if (Data_Chart.Series.Count < 1) { return; }
var _series = Data_Chart.Series[0];
if (_series != null)
{
Data_Chart.Series[0].DataSource = DataPoints;
Data_Chart.Series[0].RenderSeries(false);
}

if (Data_Chart.Axes[0] is NumericXAxis _xAxis)
{
_xAxis.RenderAxis();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

private List<DataPoint> DataPoints = new List<DataPoint>();

private void AddSeries()
{
try
{
var _xAxis = new NumericXAxis
{
TitleFontSize = 16,
TitleTextStyle = FontStyle.Regular,
LabelFontSize = 12,
LabelTextStyle = FontStyle.Regular
};
var _yAxis = new NumericYAxis
{
TitleFontSize = _xAxis.TitleFontSize,
TitleFontFamily = _xAxis.TitleFontFamily,
TitleTextStyle = _xAxis.TitleTextStyle,
LabelFontSize = _xAxis.LabelFontSize,
LabelTextStyle = _xAxis.LabelTextStyle
};

// Title for xAxis and yAxis on Signal Chart
_xAxis.Title = "Time (ms)";
_yAxis.Title = "Amplitude";

Data_Chart.Axes.Add(_xAxis);
Data_Chart.Axes.Add(_yAxis);

// Set the series paarmeters
var _series = new ScatterLineSeries
{
XAxis = _xAxis,
YAxis = _yAxis,
XMemberPath = "X",
YMemberPath = "Y",
Brush = Color.Blue,
Opacity = 1,
MarkerType = MarkerType.None,
DataSource = DataPoints
};
Data_Chart.Series.Add(_series);

//Data_Chart.VerticalZoomable = true;
//Data_Chart.HorizontalZoomable = true;

Data_Chart.IsHorizontalZoomEnabled = true;
Data_Chart.IsVerticalZoomEnabled = true;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}

public class DataPoint
{
public double X { get; set; }
public double Y { get; set; }
}
}

thank you.