% Application example, for the use of vruler.sty \documentclass[twoside]{article} \usepackage{vruler} \setlength{\textwidth}{2.5in} \setlength{\oddsidemargin}{3cm} \setlength{\evensidemargin}{6cm} \overfullrule=0pt \parindent=0pt \begin{document} \advance\textwidth 3cm %2cm is better for plain TeX \setvruler [][][][][][\textwidth] This is a simple example, in which we have placed vertical rulers on the left for odd numbered pages and on the right for even numbered pages. \newpage This is the second page and is thus an even numbered page. Please see that the vertical ruler is now on the right, and is approximately of the same distance from the text margin as the vertical ruler on the first page from the left margin there. \newpage \unsetvruler The following pages, in fact only this page, will not be appended with the vertical rulers.\newpage \setvruler[][\rulercount] This page will be added with the vertical ruler again. Here the numbering marking of the vertical ruler picks up where it was left. Nevertheless, we may start with any new number. \newpage This is another page. Please see that both this and the previous pages have vruler on the left side. \end{document}