Image larger then text with twoside book class

Question

The trick indicated here for including an image bigger than \textwidth (with \makebox) works with document class article or with oneside book but not with twoside book, even if I set nomarginpar and \marginparsep = 0pt, what is missing?

\documentclass{book}
\usepackage[nomarginpar]{geometry}
\setlength{\marginparsep}{0pt}
\usepackage{graphicx}
\usepackage{showframe}
\begin{document}
\begin{figure}%
  \makebox[\textwidth][c]{\includegraphics[width=\paperwidth]{example-image}}%
  \caption{My caption}
\end{figure}
\end{document}

P.S. = I know I can use adjustbox, I would like only to know why the trick doesn't work with twoside book class.

the code works the same way in book and article, but it overlaps the same amount on both sides so if you have differrent left and right margins it may not do what you want — David Carlisle, Nov 29 '21 at 10:05
to get a paperwidth image use a left aligned makebox and start with \hspace{-\@totalleftmargin} to get to the paper edge. — David Carlisle, Nov 29 '21 at 10:08
@DavidCarlisle I tried but it doesn't work, where have I to put it? — CarLaTeX, Nov 29 '21 at 13:09
It's not trivial to answer because many classes/packages redefine the way margins are dealt with. Are you going to use only standard classes with the geometry package? — campa, Nov 29 '21 at 13:24
Do you try changepage package? With its macro adjustwidth tis should work. \begin{figure}\begin{adjustwidth}{-2em}{-2em} \includegraphics[width=\paperwidth]{example-image}}% \caption{My caption}\end{adjustwidt} \end{figure — Zarko, Nov 29 '21 at 13:25
well naturally it will work if you do what I mean not what I wrote — David Carlisle, Nov 29 '21 at 14:03
I meant \hspace*{\dimexpr-1in-\csname @totalleftmargin\\endcsname}% \makebox[0pt][l]{\includegraphics[width=\paperwidth]{example-image with an "implied" 1in offset, but campa's answer is better with the odd/even page test — David Carlisle, Nov 29 '21 at 14:14

score 4 · Accepted Answer · answered Nov 29 '21 at 14:11

The margins of recto/verso pages are usually not symmetric, hence you need to take the correct margin into account, either \Gm@lmargin or \Gm@rmargin (assuming the package geometry is loaded). Checking if we are on an even or odd page isn't trivial, but using e.g. the changepage package we can do

\documentclass{book}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage{showframe}
\usepackage[strict]{changepage}
\newcommand*{\foo}[1]{% choose a better name :-)
   \checkoddpage
   \makebox[\textwidth][l]{\kern-\csname Gm@\ifoddpage l\else r\fi margin\endcsname\includegraphics[width=\paperwidth]{#1}}%
}
\begin{document}
\begin{figure}
  \foo{example-image-a}
  \caption{On a recto page}
\end{figure}
\begin{figure}
  \foo{example-image-b}
  \caption{On a verso page}
\end{figure}
\end{document}

Note that this basically uses labels, so in general a couple of compilations are needed to work. Alternatively you can use the package scrextend (from the KoMa bundle)

\usepackage{scrextend}
\makeatletter
\newcommand*{\foo}[1]{%
   \makebox[\textwidth][l]{\ifthispageodd{\kern-\Gm@lmargin}{\kern-\Gm@rmargin}\includegraphics[width=\paperwidth]{#1}}%
}
\makeatother

score 4 · Answer 2 · edited Nov 29 '21 at 20:35

As I mentioned in my comment: with \adjustwidth macro defined in the changeapage (it is also part of memoir document class) is simple:

\documentclass[twodside]{book}
\usepackage{geometry}
\usepackage{graphicx}
\usepackage[strict]{changepage}
%---------------- Show page layout. Don't use in a real document!
\usepackage{showframe}
\renewcommand\ShowFrameLinethickness{0.15pt}
\renewcommand*\ShowFrameColor{\color{red}}
%---------------------------------------------------------------%
\begin{document}
    \begin{figure}
\begin{adjustwidth}{-\marginparwidth}{-\marginparwidth}
\begin{minipage}{\linewidth}
\includegraphics[width=\linewidth]{example-image}%
  \caption{My caption}
\end{minipage}
\end{adjustwidth}
    \end{figure}
\begin{figure}%

\begin{adjustwidth}{-\marginparwidth}{-\marginparwidth}
\begin{minipage}{\linewidth}
\includegraphics[width=\linewidth]{example-image}%
  \caption{My caption}
\end{minipage}
\end{adjustwidth}
    \end{figure}
\end{document}

Note: second argument of adjustwidth* is width of outer margin (usually equal to marginparsep + \marginparidth)

@CarLaTeX, I did. I like to show, how to avoid your problem, not just solve it :-) — Zarko, Nov 29 '21 at 18:13
I took the liberty of fixing the inline syntax (you had a spurious backtick). I hope you're OK with that. — campa, Nov 29 '21 at 20:35

Image larger then text with twoside book class

2 Answers2