\documentclass[dutch]{article} \usepackage{babel} \usepackage{tikz-cd} \usetikzlibrary{babel} \begin{document} Simple arrows: \begin{tikzpicture} \draw[->] (-1.5,0) -- (1.5,0); \end{tikzpicture} \tikz\draw[->] (-1.5,0) -- (1.5,0); \begin{tikzcd}[row sep=huge] X(*) \arrow[r,"f_*"] & Y %X(S) \arrow[r,"f_S"] \arrow[u,"X(*\mapsto s)"] & \underline{Y}(S) \arrow[u,"-\circ (*\mapsto s)"] \end{tikzcd} \end{document}