如何使用 beamer 在海报的最左边和最右边添加垂直线

Question

我怎样才能在海报的最左边和最右边添加垂直线（使用投影仪）以便它完全被一个框包围？

目前，我的海报是这样的

http://www.docdroid.net/wdte/test.pdf.html

也就是说，我在顶部和底部有两条水平线，我想添加两条垂直线来关闭框。我使用的是名为 I6pd2 的 beamer 主题。

显示我的最小 .tex 文档

\documentclass[final]{beamer}
%\usepackage{grffile}
\usepackage[framemethod=default]{mdframed}
\usepackage{showexpl}
\usetheme{I6pd2}
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage{psfrag}
\usepackage{amsmath,amsthm, amssymb, latexsym}
%\usepackage{times}\usefonttheme{professionalfonts}  % obsolete
\usefonttheme{serif}
\graphicspath{ {./img/} }
%\boldmath
\usepackage[orientation=portrait,size=a0,scale=1.4]{beamerposter}
% change list indention level
% \setdefaultleftmargin{3em}{}{}{}{}{}
\usepackage{tikz}
\providecommand\thispdfpagelabel[1]{}
%\usepackage{snapshot} % will write a .dep file with all dependencies, allows for easy bundling
\usepackage{pgfplots}
\usepackage{ragged2e}

\usepackage{array,booktabs,tabularx}
\newcolumntype{Z}{>{\centering\arraybackslash}X} % centered tabularx columns
\newcommand{\pphantom}{\textcolor{ta3aluminium}} % phantom introduces a vertical space in p formatted table columns??!!
\newcommand{\psihat}{\hat{\psi}}
\newcommand{\phihat}{\hat{\phi}}
\newcommand{\rt}{(\mathbf{r},t)}
\newcommand{\xt}{(x,t)}
\newcommand{\ket}[1]{\ensuremath{|#1\rangle}\xspace}
\newcommand{\bra}[1]{\ensuremath{\langle #1|}\xspace}
\newcommand{\elemm}[3]{\ensuremath{\bra{#1}#2\ket{#3}}\xspace}
\newcommand{\braket}[2]{\ensuremath{\langle #1|#2\rangle}\xspace}
\newcommand\psfragg[2]{\psfrag{#1}{\small #2}}
\definecolor{darkgreen}{RGB}{0,100,0}
\definecolor{darkred}{RGB}{100,0,0}
\definecolor{darkblue}{RGB}{75,25,100}

\listfiles
\definecolor{darkgreen}{RGB}{0,100,0}
\newcommand{\myref}[5]{\textcolor{darkgreen}{{\footnotesize [#1 \textit{et al.} #2 \textbf{#3}, #4 (#5)]}}}
\newcommand{\myrefarxiv}[1]{\textcolor{darkgreen}{{\footnotesize [arXiv #1]}}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\title{A}
\author{B}
\institute[C]{D}
\date{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newlength{\columnheight}
\setlength{\columnheight}{105cm}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}
\begin{frame}
\begin{columns}
% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth}
\parbox[t][\columnheight]{\textwidth}{
% ---------------------------------------------------------%
% fill each column with content            
\begin{block}{}

\end{block}

\begin{block}{}            

\end{block}

\begin{block}{}      

\end{block}
\vspace{1cm}
\begin{mdframed}[style=innerleftmargin=20pt,innerrightmargin=20pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt]%
\usebeamerfont{block body}%
\begin{beamercolorbox}[leftskip=1em,colsep*=.0ex,sep=0.5ex,vmode]{block body}%

\end{beamercolorbox}
\end{mdframed}%
}

\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------%
% end the column
% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth} 
\parbox[t][\columnheight]{\textwidth}{ 
% ---------------------------------------------------------%
% fill each column with content

\begin{block}{}

\end{block}

\begin{block}{}

\end{block}
\vfill
}
% ---------------------------------------------------------%
% end the column
\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------% 

% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth} 
\parbox[t][\columnheight]{\textwidth}{ 
% ---------------------------------------------------------%
 % fill each column with content

\begin{block}{}

\end{block}

\begin{block}{}

\end{block}
}
% ---------------------------------------------------------%
 % end the column
\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------% 
\end{columns}
\end{frame}
\end{document}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Local Variables: 
%%% mode: latex
%%% TeX-PDF-mode: t
%%% End:

以及相应的主题

\ProvidesPackage{beamerthemeI6pd2}  % this style was created by Thomas Deselaers an Philippe Dreuw

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\RequirePackage{tangocolors}
\selectcolormodel{cmyk}
%\mode<presentation>

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\setbeamercolor{headline}{fg=black,bg=myblue1} % Cadre du dessus et du dessous
\setbeamercolor{footline}{fg=tabutter, bg=ta3gray}
\setbeamerfont{footline}{size=\large,series=\tt}
\setbeamercolor{separation line}{bg=myblue3} % Ligne de séparation entre poster et cadre du dessus et du dessous
\setbeamercolor{title in headline}{fg=myblue3} % Couleur titre
\setbeamercolor{author in headline}{fg=black} % Couleur auteurs
\setbeamercolor{institute in headline}{fg=black} % Couleur instistut

\setbeamercolor{framesubtitle}{fg=ta3orange, bg=ta2gray} 
\setbeamercolor{author in head/foot}{fg=ta2orange, bg=black}
\setbeamercolor{title in head/foot}{fg=ta2orange, bg=black}

\setbeamercolor*{normal text}{fg=tachameleon, bg=myblue1} % Couleur du fond du poster
\setbeamercolor*{block body}{bg=white,fg=black} % Couleur du texte et du fond des cadres
\setbeamercolor*{block title}{fg=black,bg=myblue2} % Couleur titre cadre
\setbeamerfont{block title}{size=\large,series=\bfseries}
\setbeamercolor{upper separation line head}{fg=ta2orange}

\setbeamercolor*{example body}{fg=ta3aluminium,bg=black}
\setbeamercolor*{example text}{fg=ta3aluminium,bg=black}
\setbeamercolor*{example title}{bg=taorange,fg=ta2gray}

%\setbeamercolor{alerted text}{fg=ta3gray}

%\setbeamercolor{example text}{fg=taorange}
\setbeamercolor{structure}{fg=myblue3} % Couleur des items

\setbeamertemplate{itemize items}[triangle]
\setbeamertemplate{navigation symbols}{}  % no navigation on a poster

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\mdfdefinestyle{topbox}{bottomline=false,innerleftmargin=0pt,innerrightmargin=0pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt}
\mdfdefinestyle{bottombox}{topline=false,innerleftmargin=20pt,innerrightmargin=20pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt}
\setbeamertemplate{block begin}{
  \vskip.75ex
\begin{mdframed}[style=topbox]%
  \begin{beamercolorbox}[sep=0pt, ht=4ex,dp=0.5ex,center,colsep*=0ex]{block title}%
    \usebeamerfont*{block title}%
    \vbox to 3ex{{\vfil\insertblocktitle\vfil}}% phantom because of baseline problem
  \end{beamercolorbox}%
\end{mdframed}%
\begin{mdframed}[style=bottombox]%
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
  \usebeamerfont{block body}%
  \begin{beamercolorbox}[leftskip=1em,colsep*=.0ex,sep=0.5ex,vmode]{block body}%
    \ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{} \justifying %
}

  \setbeamertemplate{block end}{
  \end{beamercolorbox}
\end{mdframed}%
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\mdfdefinestyle{topbox}{bottomline=false,innerleftmargin=0pt,innerrightmargin=0pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt}
\mdfdefinestyle{bottombox}{topline=false,innerleftmargin=20pt,innerrightmargin=20pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt}
\setbeamertemplate{exampleblock begin}{
  \vskip.75ex
\begin{mdframed}[style=topbox]%
  \begin{beamercolorbox}[sep=0pt, ht=4ex,dp=0.5ex,center,colsep*=0ex]{block title}%
    \usebeamerfont*{block title}%
    \vbox to 3ex{{\vfil\insertblocktitle\vfil}}% phantom because of baseline problem
  \end{beamercolorbox}%
\end{mdframed}%
\begin{mdframed}[style=bottombox]%
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
  \usebeamerfont{block body}%
  \begin{beamercolorbox}[leftskip=1em,colsep*=.0ex,sep=0.5ex,vmode]{block body}%
    \ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{} \justifying %
}

  \setbeamertemplate{exampleblock end}{
  \end{beamercolorbox}
\end{mdframed}%
}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{headline}{  
  \leavevmode
 \begin{beamercolorbox}[wd=\paperwidth]{upper separation line head}
    \rule{0pt}{3pt}
  \end{beamercolorbox}
  \begin{beamercolorbox}[wd=\paperwidth]{headline}
    \begin{columns}[T]
      \begin{column}{.02\paperwidth}
      \end{column}
      \begin{column}{.80\paperwidth}
        \centering
        \vskip10ex
        \usebeamercolor{title in headline}{\color{fg}\textbf{\LARGE{\inserttitle}}\\[1ex]}
        \vskip7.5ex
        \usebeamercolor{author in headline}{\color{fg}\Large{\insertauthor}\\[2ex]}
        \usebeamercolor{institute in headline}{\color{fg}\large{\insertinstitute}\\[1ex]}     
      \end{column}
      \begin{column}{.15\paperwidth}
        \vskip8ex
        \begin{center}

        \end{center}
        \vskip2ex
      \end{column}
      \begin{column}{.02\paperwidth}
      \end{column}
    \end{columns}
    \vskip2ex
  \end{beamercolorbox}

  \begin{beamercolorbox}[wd=\paperwidth]{lower separation line head}
    \rule{0pt}{3pt}
  \end{beamercolorbox}
}

%  \setbeamertemplate{headline}{  
%    \leavevmode
%    \begin{beamercolorbox}[sep=0.5cm,wd=.8\paperwidth]{headline}
%      \usebeamercolor{title in headline}{\raggedleft\color{fg}\textbf{\LARGE{\inserttitle}}\\[1ex]}
%      \usebeamercolor{author in headline}{\raggedleft\color{fg}\large{\insertauthor}\\[1ex]}
%      \usebeamercolor{institute in headline}{\raggedleft\color{fg}\large{\insertinstitute}\\[1ex]}     
%    \end{beamercolorbox}%
%    \begin{beamercolorbox}[wd=.2\paperwidth]{logo in headline}
%      \centering
%      \LARGE{LOGO}
%    \end{beamercolorbox}  


%}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{footline}{
  \begin{beamercolorbox}[wd=\paperwidth]{upper separation line foot}
    \rule{0pt}{3pt}
  \end{beamercolorbox}

  \leavevmode%
  \begin{beamercolorbox}[ht=4ex,leftskip=1em,rightskip=1em]{headline}%
    \textcolor{black}{\texttt{xxx}}
    \hfill
    \textcolor{black}{\texttt{yyy}}
    \vskip1ex
  \end{beamercolorbox}
  \vskip0pt%
  \begin{beamercolorbox}[wd=\paperwidth]{lower separation line foot}
    \rule{0pt}{3pt}
  \end{beamercolorbox}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Display a grid to help align images ... and it looks nice with this color scheme
%\beamertemplategridbackground[1cm]

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\mode<all>

% adapt height of imtemize rectangles
\setbeamertemplate{itemize items}[circle]
\setbeamertemplate{itemize item}{\raisebox{0.12ex}{$\bullet$}\hskip0.1em}
\setbeamertemplate{itemize subitem}{\raisebox{0.12ex}{$\circ$}\hskip0.1em}
% or define your own template using \defbeamertemplate{itemize item}, see beameruserguide.pdf

% equal font sizes for all levels
\setbeamerfont{itemize/enumerate body}{size=\normalsize}
\setbeamerfont{itemize/enumerate subbody}{size=\normalsize}
\setbeamerfont{itemize/enumerate subsubbody}{size=\normalsize}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Local Variables: 
%%% mode: latex
%%% TeX-PDF-mode: t
%%% TeX-master: "poster-surf"
%%% End:

Answer 1

您已在使用TiKZ，那么您可以使用

\tikz[remember picture,overlay]{\draw[red, line width=1cm]% 
     ([shift={(1cm,-1cm)}]current page.north west) rectangle%
     ([shift={(-1cm,1cm)}]current page.south east);}

在海报周围画一个矩形。当然，您需要根据自己的喜好调整line width颜色和角落（shift）。

我的第一个想法是在海报中包含前一个命令frame，但是 beamer 是如何构建框架的？显示这 footline是要绘制的最后一层，并且这是在 内完成的\end{frame}。因此，在 内绘制的任何内容\frame都可能被内容覆盖footline。

解决此问题的方法可能是将上一个TiKZ命令包含在footline模板定义中，如以下代码所示。（注意：我简化了示例并使用了原始的 I6pd2 主题）

\documentclass[final]{beamer}
\usetheme{I6pd2}
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usefonttheme{serif}
\usepackage[orientation=portrait,size=a0,scale=1.4]{beamerposter}
\usepackage{tikz}
\providecommand\thispdfpagelabel[1]{}
\definecolor{darkgreen}{RGB}{0,100,0}
\definecolor{darkred}{RGB}{100,0,0}
\definecolor{darkblue}{RGB}{75,25,100}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\title{My poster}
\author{Me}
\institute[My institute]{A longer name for my institute}
\date{}

\setbeamertemplate{footline}{
  \begin{beamercolorbox}[wd=\paperwidth]{upper separation line foot}
    \rule{0pt}{2pt}
  \end{beamercolorbox}

  \leavevmode%
  \begin{beamercolorbox}[ht=4ex,leftskip=1cm,rightskip=1cm]{author in head/foot}%
    \texttt{http://www.texstackexchange.com}
    \hfill
    \texttt{xxxxxxxxxxxxx}
    \vskip1ex
  \end{beamercolorbox}
  \vskip0pt%
  \begin{beamercolorbox}[wd=\paperwidth]{lower separation line foot}
    \rule{0pt}{2pt}
  \end{beamercolorbox}
  \tikz[remember picture,overlay]{\draw[red, thick] ([shift={(1cm,-1cm)}]current page.north west)rectangle([shift={(-1cm,1cm)}]current page.south east);}
}

\begin{document}
\begin{frame}
\end{frame}

更新（2015年4月20日）

除了\setbeamertemplate在主文件中重复或在主题文件中进行更改之外，还有另一种选择，\addtobeamertemplate在这种情况下可以使用。

现在代码是你的代码，其中包含边框线，结果显示了我从你的主题文件复制而来的结果背页

\documentclass[final]{beamer}
%\usepackage{grffile}
\usepackage[framemethod=default]{mdframed}
\usepackage{showexpl}
\usetheme{I6pd2}
\usepackage[english]{babel}
\usepackage[latin1]{inputenc}
\usepackage{psfrag}
\usepackage{amsmath,amsthm, amssymb, latexsym}
%\usepackage{times}\usefonttheme{professionalfonts}  % obsolete
\usefonttheme{serif}
\graphicspath{ {./img/} }
%\boldmath
\usepackage[orientation=portrait,size=a0,scale=1.4]{beamerposter}
% change list indention level
% \setdefaultleftmargin{3em}{}{}{}{}{}
\usepackage{tikz}
\providecommand\thispdfpagelabel[1]{}
%\usepackage{snapshot} % will write a .dep file with all dependencies, allows for easy bundling
\usepackage{pgfplots}
\usepackage{ragged2e}

\usepackage{array,booktabs,tabularx}
\newcolumntype{Z}{>{\centering\arraybackslash}X} % centered tabularx columns
\newcommand{\pphantom}{\textcolor{ta3aluminium}} % phantom introduces a vertical space in p formatted table columns??!!
\newcommand{\psihat}{\hat{\psi}}
\newcommand{\phihat}{\hat{\phi}}
\newcommand{\rt}{(\mathbf{r},t)}
\newcommand{\xt}{(x,t)}
\newcommand{\ket}[1]{\ensuremath{|#1\rangle}\xspace}
\newcommand{\bra}[1]{\ensuremath{\langle #1|}\xspace}
\newcommand{\elemm}[3]{\ensuremath{\bra{#1}#2\ket{#3}}\xspace}
\newcommand{\braket}[2]{\ensuremath{\langle #1|#2\rangle}\xspace}
\newcommand\psfragg[2]{\psfrag{#1}{\small #2}}
\newcommand\psfraggg[2]{\psfrag{#1}{\footnotesize #2}}
\newcommand\psfragggg[2]{\psfrag{#1}{\scriptsize #2}}
\newcommand\psfraggggg[2]{\psfrag{#1}{\tiny #2}}
\definecolor{darkgreen}{RGB}{0,100,0}
\definecolor{darkred}{RGB}{100,0,0}
\definecolor{darkblue}{RGB}{75,25,100}

\listfiles
\definecolor{darkgreen}{RGB}{0,100,0}
\newcommand{\myref}[5]{\textcolor{darkgreen}{{\footnotesize [#1 \textit{et al.} #2 \textbf{#3}, #4 (#5)]}}}
\newcommand{\myrefarxiv}[1]{\textcolor{darkgreen}{{\footnotesize [arXiv #1]}}}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\title{My title}
\author{My name and coauthors}
\institute[A shorter name for my institute]{My institute}
\date{}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newlength{\columnheight}
\setlength{\columnheight}{105cm}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% This is the modified template. It needs two runs.    
\addtobeamertemplate{footline}{}{
  \tikz[remember picture,overlay]{\draw[red, thick] ([shift={(1cm,-1cm)}]current page.north west)rectangle([shift={(-1cm,1cm)}]current page.south east);}
}

\begin{document}
\begin{frame}
\begin{columns}
% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth}
\parbox[t][\columnheight]{\textwidth}{
% ---------------------------------------------------------%
% fill each column with content            
\begin{block}{}

\end{block}

\begin{block}{}            

\end{block}

\begin{block}{}      

\end{block}

\begin{block}{}

\end{block}
}

\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------%
% end the column
% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth} 
\parbox[t][\columnheight]{\textwidth}{ 
% ---------------------------------------------------------%
% fill each column with content

\begin{block}{}

\end{block}

\begin{block}{}

\end{block}
\vspace{0.5cm}
\begin{mdframed}[style=innerleftmargin=20pt,innerrightmargin=20pt, innertopmargin=0pt, skipabove=0pt,skipbelow=0pt, linewidth=2pt]%
\usebeamerfont{block body}%
\begin{beamercolorbox}[leftskip=1em,colsep*=.0ex,sep=0.5ex,vmode]{block body}%

\end{beamercolorbox}
\end{mdframed}%
\vfill
}
% ---------------------------------------------------------%
% end the column
\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------% 

% ---------------------------------------------------------%
% Set up a column 
\begin{column}{.33\textwidth}
\begin{beamercolorbox}[center,wd=\textwidth]{postercolumn}
\begin{minipage}[T]{.98\textwidth} 
\parbox[t][\columnheight]{\textwidth}{ 
% ---------------------------------------------------------%
 % fill each column with content

\begin{block}{}

\end{block}

\begin{block}{}

\end{block}

\begin{block}{}

\end{block}
}
% ---------------------------------------------------------%
 % end the column
\end{minipage}
\end{beamercolorbox}
\end{column}
% ---------------------------------------------------------% 
\end{columns}
\end{frame}
\end{document}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%% Local Variables: 
%%% mode: latex
%%% TeX-PDF-mode: t
%%% End: