\documentclass[paper=a4,parskip=half-,ngerman]{scrartcl} \usepackage{eurosym} \usepackage[silent]{fontspec} \usepackage{libertinus-otf} \usepackage{babel} \usepackage{hvindex} \usepackage{makeidx} \makeatletter \def\theindex{% only for demonstration \section*{\indexname} \parskip\z@ \@plus .3\p@\relax \parindent\z@ \let\item\@idxitem} \makeatother %\makeindex \begin{document} \def\indexname{Sortierung nach DIN Variante 1: Ö$\rightarrow$O} \printindex \end{document}