marginnote always on right side of the page

Question

My documentclass is book, so I've got an even and odd sides. I like that the equation number are always aligned on the right side - independent of the page (even/odd). I started using marginnotes. I wanted to do the same, that the notes are always on the right side of the page? How do I do that?

Answer 1

Here's one possible solution patching (with the help of the etoolbox package) the LaTeX kernel command \@addmarginpar:

\documentclass[twoside]{book}
\usepackage[centering,marginparwidth=2.5cm]{geometry}
\usepackage{etoolbox}
\usepackage{lipsum}

\makeatletter
\patchcmd{\@addmarginpar}{\ifodd\c@page}{\ifodd\c@page\@tempcnta\m@ne}{}{}
\makeatother
\reversemarginpar

\begin{document}

\chapter{Test Chapter One}
\section{Test Section}
\lipsum[2]\marginpar{test marginnote one}
\lipsum[2-4]\marginpar{test marginnote two}
\lipsum[2-4]\marginpar{test marginnote three}
\lipsum[4-5]]\marginpar{test marginnote three}
\lipsum[6]

\end{document}

With this layout for marginnotes, it's convenient to activate the centering option for the geometry package; further adjustments might be needed so that marginnotes on even pages can be correctly displayed on a printed document.

The above code provides a solution for the standard LaTeX \marginpar command; if \marginnote (from the marginnote package) is used instead of \marginpar to produce the margin notes, then the internal macro \@mn@@@marginnote will have to be redefined:

\documentclass[twoside]{book}
\usepackage[centering,marginparwidth=2.5cm]{geometry}
\usepackage{marginnote}
\usepackage{lipsum}

\makeatletter
\long\def\@mn@@@marginnote[#1]#2[#3]{%
  \begingroup
    \ifmmode\mn@strut\let\@tempa\mn@vadjust\else
      \if@inlabel\leavevmode\fi
      \ifhmode\mn@strut\let\@tempa\mn@vadjust\else\let\@tempa\mn@vlap\fi
    \fi
    \@tempa{%
      \vbox to\z@{%
        \vss
        \@mn@margintest
        \if@reversemargin\if@tempswa
            \@tempswafalse
          \else
            \@tempswatrue
        \fi\fi
          \rlap{%
            \ifx\@mn@currxpos\relax
              \kern\marginnoterightadjust
              \if@mn@verbose
                \PackageInfo{marginnote}{%
                  xpos not known,\MessageBreak
                  using \string\marginnoterightadjust}%
              \fi
            \else\ifx\@mn@currxpos\@empty
                \kern\marginnoterightadjust
                \if@mn@verbose
                  \PackageInfo{marginnote}{%
                    xpos not known,\MessageBreak
                    using \string\marginnoterightadjust}%
                \fi
              \else
                \if@mn@verbose
                  \PackageInfo{marginnote}{%
                    xpos seems to be \@mn@currxpos,\MessageBreak
                    \string\marginnoterightadjust
                    \space ignored}%
                \fi
                \begingroup
                  \setlength{\@tempdima}{\@mn@currxpos}%
                  \kern-\@tempdima
                  \if@twoside\ifodd\@mn@currpage\relax
                      \kern\oddsidemargin
                    \else
                      \kern\evensidemargin
                    \fi
                  \else
                    \kern\oddsidemargin
                  \fi
                  \kern 1in
                \endgroup
              \fi
            \fi
            \kern\marginnotetextwidth\kern\marginparsep
            \vbox to\z@{\kern\marginnotevadjust\kern #3
              \vbox to\z@{%
                \hsize\marginparwidth
                \linewidth\hsize
                \kern-\parskip
                \marginfont\raggedrightmarginnote\strut\hspace{\z@}%
                \ignorespaces#2\endgraf
                \vss}%
              \vss}%
          }%
      }%
    }%
  \endgroup
}
\makeatother

\begin{document}

\chapter{Test Chapter One}
\section{Test Section}
\lipsum[2]\marginnote{test marginnote one}
\lipsum[2-4]\marginnote{test marginnote two}
\lipsum[2-4]\marginnote{test marginnote three}
\lipsum[4-5]\marginnote{test marginnote three}
\lipsum[6]

\end{document}