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 Escapement properties 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 IAutoShape of Rectangle type to the slide.
• Access the ITextFrame associated with the IAutoShape.
• Clear existing Paragraphs
• Create a new paragraph object for holding superscript text and add it to the IParagraphs collection of the ITextFrame.
• 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.

import aspose.slides as slides

with slides.Presentation("pres.pptx") as presentation:
    # Get slide
    slide = presentation.slides[0]

    # Create text box
    shape = slide.shapes.add_auto_shape(slides.ShapeType.RECTANGLE, 100, 100, 200, 100)
    textFrame = shape.text_frame
    textFrame.paragraphs.clear()

    # Create paragraph for superscript text
    superPar = slides.Paragraph()

    # Create portion with usual text
    portion1 = slides.Portion()
    portion1.text = "SlideTitle"
    superPar.portions.add(portion1)

    # Create portion with superscript text
    superPortion = slides.Portion()
    superPortion.portion_format.escapement = 30
    superPortion.text = "TM"
    superPar.portions.add(superPortion)

    # Create paragraph for subscript text
    paragraph2 = slides.Paragraph()

    # Create portion with usual text
    portion2 = slides.Portion()
    portion2.text = "a"
    paragraph2.portions.add(portion2)

    # Create portion with subscript text
    subPortion = slides.Portion()
    subPortion.portion_format.escapement = -25
    subPortion.text = "i"
    paragraph2.portions.add(subPortion)

    # Add paragraphs to text box
    textFrame.paragraphs.add(superPar)
    textFrame.paragraphs.add(paragraph2)

    presentation.save("TestOut.pptx", slides.export.SaveFormat.PPTX)