title: How to insert a full-page letter-size image?
body: <p>I have been trying to insert a letter-size image, but either this is cut because of the margins definition of the document style (book), or its size is limited to the specified margins.</p>
  
  <p>Below is the code with which I have managed to obtain the size of the image:</p>
  
  <pre><code>...
  \newenvironment{pagportada}{
  \begin{list}{}{
  \setlength{\hoffset}{-1in}
  \setlength{\oddsidemargin}{0cm}
  \setlength{\evensidemargin}{0cm}
  \setlength{\leftmargin}{-1in}
  \setlength{\rightmargin}{-1in}
  \setlength{\textwidth}{14.3cm}
  \setlength{\voffset}{-1in}
  \setlength{\topmargin}{0.5cm}
  \setlength{\headheight}{0pt}
  \setlength{\topsep}{0pt}
  \setlength{\headsep}{0pt}
  \setlength{\topskip}{0pt}
  \setlength{\footskip}{0pt}
  \setlength{\textheight}{19.2cm}
  %\setlength{\listparindent}{\parindent}
  %\setlength{\itemindent}{\parindent}
  %\setlength{\parsep}{\parskip}
  }\item[]}
  {\end{list}}
  </code></pre>
  
  <p>... and then call the environment to insert the figure as:</p>
  
  <pre><code>\begin{pagportada}
  \includegraphics[width=\textwidth]{Portada}
  \end{pagportada}
  \newpage
  </code></pre>