# Manage Callouts in Presentation Charts Using C++

> Create and style callouts in Aspose.Slides for C++ with concise code examples, compatible with PPT and PPTX to automate presentation workflows.

Source: https://docs.aspose.com/slides/cpp/callout/
Updated: 2026-08-02


## **Overview**

This article explains how to work with callouts for chart data labels in Aspose.Slides. It shows how to use the `set_ShowLabelAsDataCallout` method to display labels as callouts, how to configure callout-related label settings for a doughnut chart, and notes that callouts and their appearance are preserved when presentations are exported to PDF, HTML5, SVG, and raster image formats.

## **Using Callouts**
New property **ShowLabelAsDataCallout** has been added to **DataLabelFormat** class and **IDataLabelFormat** interface, which determines either specified chart's data label will be displayed as data callout or as data label. In the example given below, we have set the Callouts.

{{< gist "aspose-slides" "a690df625dc0b1fff869ab198affe7a4" "Examples-SlidesCPP-DisplayChartLabels-DisplayChartLabels.cpp" >}}

## **Set a Callout for a Doughnut Chart**
Aspose.Slides for C++ provides support for setting series data label callout shape for a Doughnut chart. Below sample example is given.

{{< gist "aspose-slides" "a690df625dc0b1fff869ab198affe7a4" "Examples-SlidesCPP-AddDoughnutCallout-AddDoughnutCallout.cpp" >}}

## **FAQ**

### Are callouts preserved when converting a presentation to PDF, HTML5, SVG, or images?

Yes. Callouts are part of the chart rendering, so when you export to [PDF](/slides/cpp/convert-powerpoint-to-pdf/), [HTML5](/slides/cpp/export-to-html5/), [SVG](/slides/cpp/render-a-slide-as-an-svg-image/), or [raster images](/slides/cpp/convert-powerpoint-to-png/), they are preserved together with the slide’s formatting.

### Do custom fonts work in callouts, and can their appearance be preserved on export?

Yes. Aspose.Slides supports [embedding fonts](/slides/cpp/embedded-font/) into the presentation and controls font embedding during exports such as [PDF](/slides/cpp/convert-powerpoint-to-pdf/), ensuring the callouts look the same across different systems.