tikz Overlay
\documentclass[paper=a4,DIV=11]{scrbook}
\usepackage{tikz,showframe}% Only for demo
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}[overlay, remember picture]
\node[anchor=south west, %anchor is bottom left corner of the graphic
% xshift=-1.4mm, % for exactly lower left
% yshift=-1.4mm
]
at (current page.south west) %left bottom corner of the page
{\tikz\draw[red] (0,0) grid
[xstep=\dimexpr\paperwidth/11,
ystep=\dimexpr\paperheight/11] (\paperwidth,\paperheight);
};
\end{tikzpicture}
\end{document}
Warum ist das Gitter nicht _genau_ in der unteren linken Ecke?
[![alt text][1]][1]
Atuelles TL 2020
[1]: https://texwelt.de/upfiles/Bildschirmfoto_2020-04-19_um_08.30.34.png