\documentclass{article} \usepackage[utf8]{inputenc} \usepackage[ngerman]{babel} \usepackage{xsim,lipsum,xcolor} \xsimsetup{ solution/print = true , blank/filled-style = \underline{\textcolor{red}{#1}} } \begin{document} \begin{exercise}[points=3] Erklären Sie den Begriff. \blank[width=4\linewidth,linespread=1.5]{} \end{exercise} \begin{solution} \blank[width=4\linewidth,linespread=1.5]{Die Lösung hier soll rot sein.} \end{solution} \end{document}