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Using R and its knitr package under Windows 10 to produce a PDF file with an index, I have found that indexed words with 'fi' in them often appear incorrectly when I copy the index into Excel [to do other work with it there]. For example, con dence intervals or entropy based lter.
Is there a package or technique that will correct this problem?
Without MWE difficult to say, but what about this:
\documentclass{article}
\usepackage{microtype}
\DisableLigatures{}
\begin{document}
Auflaufform
\end{document}
No ligatures (ahem, not tested).
(Example stolen here: http://texwelt.de/wissen/antwort_link/57/ )
