# Customize Chart Data Tables in Presentations Using C++

> Customize chart data tables in C++ for PPT and PPTX with Aspose.Slides to boost efficiency and appeal in presentations.

Source: https://docs.aspose.com/slides/cpp/chart-data-table/
Updated: 2026-08-05


## **Overview**

This article explains how to work with chart data tables in Aspose.Slides. It shows how to display a data table for a chart and customize its text formatting by setting font properties such as bold style and font height. The example demonstrates loading a presentation, adding a chart, enabling the chart data table, applying font settings, and saving the updated presentation.

## **Set Font Properties for a Chart Data Table**
Aspose.Slides for C++ allows to change font properties for a chart data table. 

1. Instantiate [Presentation](https://reference.aspose.com/slides/cpp/class/aspose.slides.presentation) class object.
1. Add chart on the slide.
1. Set chart table.
1. Set font height.
1. Save modified presentation.

Below sample example is given. 

``` cpp
#include <DOM/Chart/ChartType.h>
#include <DOM/Chart/IChartPortionFormat.h>
#include <DOM/Chart/IChartTextFormat.h>
#include <DOM/Chart/IDataTable.h>
#include <DOM/IChart.h>
#include <DOM/IShapeCollection.h>
#include <DOM/ISlide.h>
#include <DOM/ISlideCollection.h>
#include <DOM/NullableBool.h>
#include <DOM/Presentation.h>
#include <Export/SaveFormat.h>
using namespace Aspose::Slides;
using namespace Aspose::Slides::Charts;
using namespace Aspose::Slides::Export;

auto pres = System::MakeObject<Presentation>(u"test.pptx");
    
auto chart = pres->get_Slides()->idx_get(0)->get_Shapes()->AddChart(ChartType::ClusteredColumn, 50.0f, 50.0f, 600.0f, 400.0f);

chart->set_HasDataTable(true);

chart->get_ChartDataTable()->get_TextFormat()->get_PortionFormat()->set_FontBold(NullableBool::True);
chart->get_ChartDataTable()->get_TextFormat()->get_PortionFormat()->set_FontHeight(20.0f);

pres->Save(u"output.pptx", SaveFormat::Pptx);
```

## **FAQ**

### Can I show small legend keys next to the values in the chart’s data table?

Yes. The data table supports [legend keys](https://reference.aspose.com/slides/cpp/aspose.slides.charts/datatable/set_showlegendkey/), and you can turn them on or off.

### Will the data table be preserved when exporting the presentation to PDF, HTML, or images?

Yes. Aspose.Slides renders the chart as part of the slide, so the exported [PDF](/slides/cpp/convert-powerpoint-to-pdf/)/[HTML](/slides/cpp/convert-powerpoint-to-html/)/[image](/slides/cpp/convert-powerpoint-to-png/) includes the chart with its data table.

### Are data tables supported for charts that come from a template file?

Yes. For any chart loaded from an existing presentation or template, you can check and change whether a data table [is shown](https://reference.aspose.com/slides/cpp/aspose.slides.charts/chart/set_hasdatatable/) using the chart’s properties.

### How can I quickly find which charts in a file have the data table enabled?

Inspect each chart’s property that indicates whether the data table [is shown](https://reference.aspose.com/slides/cpp/aspose.slides.charts/chart/get_hasdatatable/) and iterate through the slides to identify the charts where it is enabled.