Superscript and Subscript

Manage Super Script and Sub Script Text

You can add superscript and subscript text inside any paragraph portion. For adding Superscript or Subscript text in Aspose.Slides text frame one must use the setEscapement method of PortionFormat class.

This property returns or sets the superscript or subscript text (value from -100% (subscript) to 100% (superscript)). For example:

Create an instance of Presentation class.
Obtain the reference of a slide by using its Index.
Add an AutoShape of Rectangle type to the slide.
Access the TextFrame associated with the AutoShape.
Clear existing Paragraphs
Create a new paragraph object for holding superscript text and add it to the Paragraphs collection of the TextFrame.
Create a new portion object
Set Escapement property for the portion between 0 to 100 for adding superscript. (0 mean no superscript)
Set some text for Portion and then add that in portion collection of paragraph.
Create a new paragraph object for holding subscript text and add it to the IParagraphs collection of the ITextFrame.
Create a new portion object
Set Escapement property for portion between 0 to -100 for adding superscript. (0 mean no subscript)
Set some text for Portion and then add that in portion collection of paragraph.
Save the presentation as a PPTX file.

The implementation of the above steps is given below.

// Instantiate a Presentation class that represents a PPTX
var pres = new aspose.slides.Presentation();
try {
    // Get slide
    var slide = pres.getSlides().get_Item(0);
    // Create text box
    var shape = slide.getShapes().addAutoShape(aspose.slides.ShapeType.Rectangle, 100, 100, 200, 100);
    var textFrame = shape.getTextFrame();
    textFrame.getParagraphs().clear();
    // Create paragraph for superscript text
    var superPar = new aspose.slides.Paragraph();
    // Create portion with usual text
    var portion1 = new aspose.slides.Portion();
    portion1.setText("SlideTitle");
    superPar.getPortions().add(portion1);
    // Create portion with superscript text
    var superPortion = new aspose.slides.Portion();
    superPortion.getPortionFormat().setEscapement(30);
    superPortion.setText("TM");
    superPar.getPortions().add(superPortion);
    // Create paragraph for subscript text
    var paragraph2 = new aspose.slides.Paragraph();
    // Create portion with usual text
    var portion2 = new aspose.slides.Portion();
    portion2.setText("a");
    paragraph2.getPortions().add(portion2);
    // Create portion with subscript text
    var subPortion = new aspose.slides.Portion();
    subPortion.getPortionFormat().setEscapement(-25);
    subPortion.setText("i");
    paragraph2.getPortions().add(subPortion);
    // Add paragraphs to text box
    textFrame.getParagraphs().add(superPar);
    textFrame.getParagraphs().add(paragraph2);
    pres.save("formatText.pptx", aspose.slides.SaveFormat.Pptx);
} finally {
    if (pres != null) {
        pres.dispose();
    }
}

FAQ

Will superscript and subscript be preserved when exporting to PDF or other formats?

Yes, Aspose.Slides properly retains superscript and subscript formatting when exporting presentations to PDF, PPT/PPTX, images, and other supported formats. The specialized formatting remains intact in all output files.

Can superscript and subscript be combined with other formatting styles such as bold or italics?

Yes, Aspose.Slides allows you to mix various text styles within a single portion of text. You can enable bold, italics, underline, and simultaneously apply superscript or subscript by configuring the corresponding properties in PortionFormat.

Do superscript and subscript formatting work for text inside tables, charts, or SmartArt?

Yes, Aspose.Slides supports formatting within most objects, including tables and chart elements. When working with SmartArt, you need to access the appropriate elements (such as SmartArtNode) and their text containers, and then configure the PortionFormat properties in a similar manner.

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