Example for dual screen PDF with navigation

Test.tex

% Adopted from http://tex.stackexchange.com/questions/232838/beamer-with-notes-on-the-left-have-navigation-links-working-both-on-slides-rig
\documentclass[handout]{beamer}
\usepackage{pgfpages,microtype}
\setbeameroption{show notes on second screen=left}
\usetheme[compress]{Singapore}
\makeatletter
\defbeamertemplate*{headline}{miniframes theme plus}
{%
  \begin{beamercolorbox}[colsep=1.5pt]{upper separation line head}
  \end{beamercolorbox}
  \begin{beamercolorbox}{section in head/foot}
    %\vskip2pt\insertnavigation{\paperwidth}\vskip2pt
    \vskip4pt\hbox{\insertnavigation{\paperwidth}\insertnavigation{\paperwidth}}\vskip2pt
  \end{beamercolorbox}%
  \ifbeamer@theme@subsection%
    \begin{beamercolorbox}[colsep=1.5pt]{middle separation line head}
    \end{beamercolorbox}
    \begin{beamercolorbox}[ht=2.5ex,dp=1.125ex,%
      leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
      \usebeamerfont{subsection in head/foot}\insertsubsectionhead
    \end{beamercolorbox}%
  \fi%
  \begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
  \end{beamercolorbox}
}
\addtoheadtemplate{\pgfuseshading{beamer@headfade}\vskip-1.25cm}{}



%%%%%%%%%%%%%%%%%%%%
%ADDITIONAL CODE
%notes
\setbeamertemplate{note page}[plain] % Beamer manual, section 19.1
\newlength{\parskipbackup}
\setlength{\parskipbackup}{\parskip}
\newlength{\parindentbackup}
\setlength{\parindentbackup}{\parindent}
\newcommand{\baselinestretchbackup}{\baselinestretch}

\usetemplatenote{
  \tiny
    \begin{beamercolorbox}{section in head/foot}
      \vskip2pt\hbox{\hskip-30pt\insertnavigation{\paperwidth}}\vskip2pt
    \end{beamercolorbox}%
  \insertslideintonotes{0.3}

  \setlength{\parindent}{1em} \setlength{\parskip}{1ex}%
  \renewcommand{\baselinestretch}{1}%

  \rmfamily \tiny %better \scriptsize for the handout

  \insertnote%

  \setlength{\parskip}{\parskipbackup}%
  \setlength{\parindent}{\parindentbackup}%
  \renewcommand{\baselinestretch}{\baselinestretchbackup}%
}
%%%%%%%%%%%%%%%%%%%%



\begin{document}
   \section{Background}
      \subsection{sub1}
         \begin{frame}
            Background -- sub1 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Background -- sub1 -- Frame 2
            \note{Notes}
         \end{frame}
         \begin{frame}
            Background -- sub1 -- Frame 3
            \note{Notes}
         \end{frame}
      \subsection{sub2}
         \begin{frame}
            Background -- sub2
            \note{Notes}
         \end{frame}
      \subsection{sub3}
         \begin{frame}
            Background -- sub3 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Background -- sub3 -- Frame 2
            \note{Notes}
         \end{frame}
      \subsection{sub4}
         \begin{frame}
            Background -- sub4 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Background -- sub4 -- Frame 2
            \note{Notes}
         \end{frame}
   \section{Importance and objective}
      \subsection{sub1}
         \begin{frame}
            Importance and objective -- sub1
            \note{Notes}
         \end{frame}
      \subsection{sub2}
         \begin{frame}
            Importance and objective -- sub2
            \note{Notes}
         \end{frame}
      \subsection{sub3}
         \begin{frame}
            Importance and objective -- sub3
            \note{Notes}
         \end{frame}
   \section{Methods}
      \subsection{sub1}
         \begin{frame}
            Methods -- sub1
            \note{Notes}
         \end{frame}
      \subsection{sub2}
         \begin{frame}
            Methods -- sub2
            \note{Notes}
         \end{frame}
      \subsection{sub3}
         \begin{frame}
            Methods -- sub3
            \note{Notes}
         \end{frame}
   \section{Results}
      \subsection{sub1}
         \begin{frame}
            Results -- sub1
            \note{Notes}
         \end{frame}
      \subsection{sub2}
         \begin{frame}
            Results -- sub2 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub2 -- Frame 2
            \note{Notes}
         \end{frame}
      \subsection{sub3}
         \begin{frame}
            Results -- sub3 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub3 -- Frame 2
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub3 -- Frame 3
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub3 -- Frame 4
            \note{Notes}
         \end{frame}
      \subsection{sub4}
         \begin{frame}
            Results -- sub4 -- Frame 1
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub4 -- Frame 2
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub4 -- Frame 3
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub4 -- Frame 4
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub4 -- Frame 5
            \note{Notes}
         \end{frame}
         \begin{frame}
            Results -- sub4 -- Frame 6
            \note{Notes}
         \end{frame}
   \section{Future directions}
      \subsection{sub1}
         \begin{frame}
            Future directions -- sub1
            \note{Notes}
         \end{frame}
\end{document}