\input{preamble-standalone.ltx} \begin{document} % Ex. No. 212 (Section 25.5.1 : Coordinate transfer with \tkzcname{tkzGetPointCoord}) \begin{tikzpicture} \tkzInit[xmax=5,ymax=3] \tkzGrid[sub,orange] \tkzAxeXY \tkzDefPoint(1,0){A} \tkzDefPoint(4,2){B} \tkzGetPointCoord(A){a} \tkzGetPointCoord(B){b} \tkzDefPoint(\ax,\ay){C} \tkzDefPoint(\bx,\by){D} \tkzDrawPoints[color=red](C,D) \end{tikzpicture} \end{document}