\documentclass[table,color]{fithesis3} \usepackage{tabu} \thesissetup{faculty=med} \begin{document} \begin{tabular}{ccc} a&b&c\\ d&e&f \end{tabular} \begin{tabularx}{\textwidth}{ccc} a&b&c\\ d&e&f \end{tabularx} \begin{tabu}{ccc} a&b&c\\ d&e&f \end{tabu} \end{document}