\documentclass[paper=a4,parskip=half-,ngerman]{scrartcl} \usepackage{eurosym} \usepackage[silent]{fontspec} \usepackage{libertinus-otf} \usepackage{babel} \usepackage{makeidx} \usepackage{hvlogos} %\newcommand\doublequote{"{}} \let\nxLnotation\texttt \let\nxLPack\texttt \let\nxLenv\texttt \let\nxLkeyword\texttt \let\idxbf\textbf \def\idxtextClasses{Dokumentenklasse} \begin{document} \printindex \end{document}