Customize Chart Legends in Presentations Using С++

Legend Positioning

In order to set the legend properties. Please follow the steps below:

• Create an instance of Presentation class.
• Get the reference of the slide.
• Adding a chart on slide.
• Setting the properties of legend.
• Write the presentation as a PPTX file.

In the example given below, we have set the position and size for Chart legend.

Set the Font Size of a Legend

The Aspose.Slides for C++ lets developers allow to set the font size of the legend. Please follow the steps below: 

• Instantiate Presentation class.
• Creating the default chart.
• Set the Font Size.
• Set minimum axis value.
• Set maximum axis value.
• Write a presentation to disk.

Set the Font Size of an Individual Legend

The Aspose.Slides for C++ lets developers allow to set the font size of individual legend entries. Please follow the steps below: 

• Instantiate Presentation class.
• Creating the default chart.
• Access legend entry.
• Set the Font Size.
• Set minimum axis value.
• Set maximum axis value.
• Write a presentation to disk.

FAQ

Can I enable the legend so that the chart automatically allocates space for it instead of overlaying it?

Yes. Use the non-overlay mode (set_Overlay(false)); in this case, the plot area will shrink to accommodate the legend.

Can I make multi-line legend labels?

Yes. Long labels wrap automatically when space is insufficient; forced line breaks are supported via newline characters in the series name.

How do I make the legend follow the presentation theme’s color scheme?

Do not set explicit colors/fills/fonts for the legend or its text. They will then inherit from the theme and update correctly when the design changes.