Tikznode and positioning on A4paper

Question

I found for a watermark the following solution:

\documentclass{article}
\usepackage[margin=2.5cm, showframe]{geometry} 
\usepackage{tikzpagenodes}
\usepackage{eso-pic}
\usepackage{lipsum}%<- only to add some text
\AddToShipoutPicture{\begin{tikzpicture}[overlay,remember picture]
        \ifodd\value{page}
        \node[anchor=south,rotate=90,pink,font=\sffamily\Huge] 
        (AE) at ([xshift=-1em]current page text area.west){Albert Einstein};
        \draw[very thick,pink] (AE.east) -- ++ (0,4)
        (AE.west) -- ++ (0,-4);
        \else
        \node[anchor=south,rotate=-90,pink,font=\sffamily\Huge] 
        (CFG) at ([xshift=1em]current page text area.east){Carl Friedrich Gauss};
        \draw[very thick,pink] (CFG.west) -- ++ (0,4)
        (CFG.east) -- ++ (0,-4);
        \fi   
\end{tikzpicture}}
\begin{document}
    \lipsum[1-3]
    \newgeometry{left=1.5cm, right=1.5cm, bottom=1cm}
    \lipsum[2-5]
    \newpage
    \lipsum[1]
\end{document}

This looks almost perfect except a tiny detail. The positioning is done relative to the given side geometry. Since I have some pages which have a different settings the watermark seems quite odd - especially when on these special pages only one graphic is inserted. There the overlapping doesn't matter.

Is there a way to position the \node in a fixed way? e.g. 1.5cm left (or right) and in the middle of the page (which could be calculated manually as well).

UPDATE I've updated the example to contain more than just 2 pages. I would like to have on page 1 and page 3 exactly the same positions of the watermark - despite the geometry settings.

Does this answer help? https://tex.stackexchange.com/a/89592 It uses the node (currentpage) and its anchors. — gernot, Jan 21 '21 at 09:47
Something like \node[rotate=90,pink,font=\sffamily\Huge] at (current page.center) won't help much. Or do you mean some other syntax? — LeO, Jan 21 '21 at 10:01
why do you use current page text area.west if you don't want a placement relative to the text area? — Ulrike Fischer, Jan 21 '21 at 10:07

gernot · Accepted Answer · 2021-01-21T14:43:27.687

Place the watermark relative to (current page) instead of (current page text area).

\documentclass{article}
\usepackage[margin=2.5cm, showframe]{geometry} 
\usepackage{tikz}
\usepackage{eso-pic}
\usepackage{lipsum}%<- only to add some text
\AddToShipoutPicture{\begin{tikzpicture}[overlay,remember picture]
        \ifodd\value{page}
        \node[anchor=south,rotate=90,pink,font=\sffamily\Huge] 
        (AE) at ([xshift=3em]current page.west){Albert Einstein};
        \draw[very thick,pink] (AE.east) -- ++ (0,4)
        (AE.west) -- ++ (0,-4);
        \else
        \node[anchor=south,rotate=-90,pink,font=\sffamily\Huge] 
        (CFG) at ([xshift=-3em]current page.east){Carl Friedrich Gauss};
        \draw[very thick,pink] (CFG.west) -- ++ (0,4)
        (CFG.east) -- ++ (0,-4);
        \fi   
\end{tikzpicture}}
\begin{document}
    \lipsum[1-3]
    \newgeometry{left=1.5cm, right=1.5cm, bottom=1cm}
    \lipsum[2-5]
    \newpage
    \lipsum[1]
\end{document}

\usepackage{tikzpagenodes} should be replaced by \usepackage{tikz} ? — Black Mild, Jan 21 '21 at 14:21

Tikznode and positioning on A4paper

1 Answers1