

Therefore, based on egreg’s excellent answer here, I recently added the package leftindex to CTAN. It's easy to format a character as superscript (slightly above the baseline) or subscript (slightly below the baseline) in Libre Office Calc.Subscribe to Fre. You Get word processors like Microsoft Word, LibreOffice Writer and Apple Pages. (maintained 2007-2008, 2020) An extension for OpenOffice and LibreOffice that applies superscript and subscript formatting to chemical formulas in bulk in.

I am dissatisfied with the existing options, including \prescript from mathtools, since they do not even make an attempt at fixing the spacing between the symbol and the left superscript.
