\input{preamble-standalone.ltx} \begin{document} % Ex. No. 251 (Section 32.2 : \tkzcname{tkzInit} and \tkzcname{tkzShowBB}) \begin{tikzpicture} \tkzInit[xmin=-1,xmax=3,ymin=-1, ymax=3] \tkzGrid \tkzShowBB[red,line width=2pt] \end{tikzpicture} \end{document}