\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 42 (Section  7.0.6 : Option \tkzname{xstep}, \tkzname{xstep}, \tkzname{subxstep} et \tkzname{subystep})

\begin{tikzpicture}
\tkzInit[xmax=.5,xstep=.1,
         ymax=.2,ystep=.1]
\tkzGrid[sub,
         subxstep = 0.05,
         subystep = 0.05,
         color=orange]
\tkzAxeXY
\end{tikzpicture}

\end{document}
