# Manage Chart Data Markers in Presentations Using PHP

> Learn how to customize chart data markers in Aspose.Slides for PHP, boosting presentation impact across PPT and PPTX formats with clear code examples.

Source: https://docs.aspose.com/slides/php-java/chart-data-marker/
Updated: 2026-08-02


## **Overview**

This article explains how to work with chart data markers in Aspose.Slides. It shows how to create a chart, access a series and its data points, apply picture fills to markers at the data-point level, adjust marker size, and save the updated presentation. It also notes that standard marker shapes are available through the `MarkerStyleType` enumeration and that marker appearance is preserved when exporting charts to raster formats or SVG.

## **Set Chart Marker Options**
The markers can be set on chart data points inside particular series. In order to set chart marker options. Please follow the steps below:

- Instantiate [Presentation](https://reference.aspose.com/slides/php-java/aspose.slides/Presentation) class.
- Creating the default chart.
- Set the picture.
- Take first chart series.
- Add new data point.
- Write presentation to disk.

In the example given below, we have set the chart marker options on data points level.

```php
  # Creating empty presentation
  $pres = new Presentation();
  try {
    # Access first slide
    $slide = $pres->getSlides()->get_Item(0);
    # Creating the default chart
    $chart = $slide->getShapes()->addChart(ChartType::LineWithMarkers, 0, 0, 400, 400);
    # Getting the default chart data WorkSheet index
    $defaultWorksheetIndex = 0;
    # Getting the chart data WorkSheet
    $fact = $chart->getChartData()->getChartDataWorkbook();
    # Delete demo series
    $chart->getChartData()->getSeries()->clear();
    # Add new series
    $chart->getChartData()->getSeries()->add($fact->getCell($defaultWorksheetIndex, 1, 1, "Series 1"), $chart->getType());
    # Load the picture 1
    $imgx1 = $pres->getImages()->addImage(new Java("java.io.FileInputStream", new Java("java.io.File", "Desert.jpg")));
    # Load the picture 2
    $imgx2 = $pres->getImages()->addImage(new Java("java.io.FileInputStream", new Java("java.io.File", "Tulips.jpg")));
    # Take first chart series
    $series = $chart->getChartData()->getSeries()->get_Item(0);
    # Add new point (1:3) there.
    $point = $series->getDataPoints()->addDataPointForLineSeries($fact->getCell($defaultWorksheetIndex, 1, 1, 4.5));
    $point->getMarker()->getFormat()->getFill()->setFillType(FillType::Picture);
    $point->getMarker()->getFormat()->getFill()->getPictureFillFormat()->getPicture()->setImage($imgx1);
    $point = $series->getDataPoints()->addDataPointForLineSeries($fact->getCell($defaultWorksheetIndex, 2, 1, 2.5));
    $point->getMarker()->getFormat()->getFill()->setFillType(FillType::Picture);
    $point->getMarker()->getFormat()->getFill()->getPictureFillFormat()->getPicture()->setImage($imgx2);
    $point = $series->getDataPoints()->addDataPointForLineSeries($fact->getCell($defaultWorksheetIndex, 3, 1, 3.5));
    $point->getMarker()->getFormat()->getFill()->setFillType(FillType::Picture);
    $point->getMarker()->getFormat()->getFill()->getPictureFillFormat()->getPicture()->setImage($imgx1);
    $point = $series->getDataPoints()->addDataPointForLineSeries($fact->getCell($defaultWorksheetIndex, 4, 1, 4.5));
    $point->getMarker()->getFormat()->getFill()->setFillType(FillType::Picture);
    $point->getMarker()->getFormat()->getFill()->getPictureFillFormat()->getPicture()->setImage($imgx2);
    # Changing the chart series marker
    $series->getMarker()->setSize(15);
    # Save presentation with chart
    $pres->save("ScatterChart.pptx", SaveFormat::Pptx);
  } catch (JavaException $e) {
  } finally {
    if (!java_is_null($pres)) {
      $pres->dispose();
    }
  }
```

## **FAQ**

### Which marker shapes are available out of the box?

Standard shapes are available (circle, square, diamond, triangle, etc.); the list is defined by the [MarkerStyleType](https://reference.aspose.com/slides/php-java/aspose.slides/markerstyletype/) class. If you need a non-standard shape, use a marker with a picture fill to emulate custom visuals.

### Are markers preserved when exporting a chart to an image or SVG?

Yes. When rendering charts to [raster formats](/slides/php-java/convert-powerpoint-to-png/) or saving [shapes as SVG](/slides/php-java/render-a-slide-as-an-svg-image/), markers retain their appearance and settings, including size, fill, and outline.