User Interface Location: Text Formatting > Text Font

Watch this video to learn more about using subscript and superscript in PTC Mathcad Prime 10.0.0.0:

You can now apply subscript or superscript formatting to any text within a text box or a text block.

PTC Mathcad Prime 10.0.0.0 provides controls to format text content that requires subscripts, such as variable identifiers, or superscripts, such as variable exponents. You can select subscript or superscript while in a text region and type. Alternatively, apply subscript or superscript to the selected portions of the text.