TeX/Latex - Ayuda con el diseño de las paginas

\begin{tcolorbox}[\textwidth, \textheight]

   bla bla bla ...

\end{tcolorbox}

\documentclass{article}

\usepackage{pgf}

\usepackage{pgfpages}

\pgfpagesdeclarelayout{boxed}

{

  \edef\pgfpageoptionborder{0pt}

}

{

  \pgfpagesphysicalpageoptions

  {%

    logical pages=1,%

  }

  \pgfpageslogicalpageoptions{1}

  {

    border code=\pgfsetlinewidth{2pt}\pgfstroke,%

    border shrink=\pgfpageoptionborder,%

    resized width=.8\pgfphysicalwidth,%

    resized height=.8\pgfphysicalheight,%

    center=\pgfpoint{.5\pgfphysicalwidth}{.5\pgfphysicalheight}%

  }%

}

\usepackage{lipsum}

\pgfpagesuselayout{boxed}

\begin{document}

\lipsum[1-40]

\end{document}