DevExpress Presentation API: ChartEx Axes

• May 21, 2026
• 2 minutes to read

Charts API automatically creates chart axis objects once you add a series to the chart Series collection.

ChartEx supports only CategoryAxisEx and ValueAxisEx types. To access the chart axes, use the following properties:

• ChartEx.ArgumentAxis property to access the argument axis (X-axis).
• ChartEx.ValueAxis property to access the value axis (Y-axis).
• ChartEx.SecondaryValueAxis property to access the secondary value axis.

ChartEx series require different axis sets depending on the series type. For example, a Box and Whisker series requires an argument axis and a value axis, while a Sunburst series does not require axes. The following table lists the required axes for each series type:

Series type	ArgumentAxis type	ValueAxis type	Secondary ValueAxis type
Box and Whisker	CategoryAxisEx	ValueAxisEx	-
Funnel	CategoryAxisEx	-	-
Histogram	CategoryAxisEx	-	-
Pareto	CategoryAxisEx	ValueAxisEx	ValueAxisEx
Filled Map	-	-	-
Sunburst	-	-	-
Treemap	-	-	-
Waterfall	CategoryAxisEx	ValueAxisEx	-

The following example changes the font size for both ChartEx axes:

C#

using DevExpress.Docs.Office;
using DevExpress.Docs.Presentation;

    ChartEx chartEx = new ChartEx();
    slide.Shapes.Add(chartEx);

    chartEx.Width = presentation.SlideSize.Width;
    chartEx.Height = presentation.SlideSize.Height;

    WaterfallSeries series = new WaterfallSeries();
    series.Text = "Cash Flow";
    series.Arguments = new ChartStringData(new[] { "Start", "Jan", "Feb", "Mar", "End" });
    series.Values = new ChartNumericData(new[] { 5.0, 12.0, -5.0, 8.0, 15.0 });

    chartEx.Series.Add(series);

    CategoryAxisEx? xAxis = chartEx.ArgumentAxis;
    if (xAxis != null) {
        xAxis.TextProperties = new TextProperties { FontSize = 24 };
    }

    ValueAxisEx? yAxis = chartEx.ValueAxis;
    if (yAxis != null) {
        yAxis.TextProperties = new TextProperties { FontSize = 24 };
    }

VB.NET

Imports DevExpress.Docs.Office
Imports DevExpress.Docs.Presentation

    Dim chartEx As New ChartEx()
    slide.Shapes.Add(chartEx)

    chartEx.Width = presentation.SlideSize.Width
    chartEx.Height = presentation.SlideSize.Height

    Dim series As New WaterfallSeries()
    series.Text = "Cash Flow"
    series.Arguments = New ChartStringData(New String() {"Start", "Jan", "Feb", "Mar", "End"})
    series.Values = New ChartNumericData(New Double() {5.0, 12.0, -5.0, 8.0, 15.0})

    chartEx.Series.Add(series)

    Dim xAxis As CategoryAxisEx = chartEx.ArgumentAxis
    If xAxis IsNot Nothing Then
        xAxis.TextProperties = New TextProperties With {.FontSize = 24}
    End If

    Dim yAxis As ValueAxisEx = chartEx.ValueAxis
    If yAxis IsNot Nothing Then
        yAxis.TextProperties = New TextProperties With {.FontSize = 24}
    End If

Customize Axes

ChartEx axis customization is similar to Chart. For more information on how to customize axes and their elements, refer to the following help topic: Chart Axes.