Manage Superscript and Subscript in Python

You can add superscript and subscript text to any paragraph portion. In Aspose.Slides, use the escapement property of the PortionFormat class to control this.

escapement is a percentage from -100% to 100%:

• > 0 → superscript (e.g., 25% = slight raise; 100% = full superscript)
• 0 → baseline (no super/subscript)
• < 0 → subscript (e.g., -25% = slight lower; -100% = full subscript)

Steps:

1. Create a Presentation and get a slide.
2. Add a rectangle AutoShape and access its TextFrame.
3. Clear existing paragraphs.
4. For superscript: create a paragraph and a portion, set portion.portion_format.escapement to a value between 0 and 100, set text, and add the portion.
5. For subscript: create another paragraph and portion, set escapement to a value between -100 and 0, set text, and add the portion.
6. Save the presentation as PPTX.

import aspose.slides as slides

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

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

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

    # Create a text portion with regular text.
    portion1 = slides.Portion()
    portion1.text = "SlideTitle"
    superscript_paragraph.portions.add(portion1)

    # Create a text portion with superscript text.
    superscript_portion = slides.Portion()
    superscript_portion.portion_format.escapement = 30
    superscript_portion.text = "TM"
    superscript_paragraph.portions.add(superscript_portion)

    # Create a paragraph for the subscript text.
    subscript_paragraph = slides.Paragraph()

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

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

    # Add the paragraphs to the text box.
    shape.text_frame.paragraphs.add(superscript_paragraph)
    shape.text_frame.paragraphs.add(subscript_paragraph)

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