Adding foldmarks in KOMA-script but NOT scrlttr2

Question

Is there an easy way to add foldmarks in KOMA-script classes?

I am aware of the foldmarks-option in scrlttr2, but that works only in scrlttr2.

Answer 1

I am not quite sure if there is a solution for every possible papersize, if you want to stick to the DIN norm. The ratios in the example are according to the ratios of foldmarks on A4 paper. This generates foldmarks on the first page. Please note that I did not look up the correct positions or lengths for these marks on other paper sizes. With the values of 35.35%, 50% and 70.71% (0.3535, 0.50 & 0.7071) this might not be the right values for non A4 paper. Also these values are for a small letter head. For a large letter head you might want to adjust them to 1-0.3535, 0.5 and 1-0.7071 accordingly.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{calc}
\usepackage{lipsum}
\begin{document}
\begin{tikzpicture}[overlay,remember picture]
\draw ($(current page.north west)!0.3535!(current page.south west)$)--++(0.5cm,0cm);
\draw ($(current page.north west)!0.50!(current page.south west)$)--++(0.8cm,0cm);
\draw ($(current page.north west)!0.7071!(current page.south west)$)--++(0.5cm,0cm);
\end{tikzpicture}
\lipsum
\end{document}