Text Formatting ⇒ Formatting for multi-columned Poster

[KateSmith410]

I'm currently creating a poster but having trouble with the formatting. I have three columns but I'm unable to make the column lines spread to the end of the page. I have included my code to illustrate what I mean. The column lines only extend to half the page. Any help in solving this would be great.

Code: Select all

\documentclass[a0b,landscape]{a0poster}
\usepackage{epsfig}
\usepackage{multicol}
\usepackage{pstricks,pst-grad}
\usepackage{color}
\setlength{\columnsep}{3cm}
\setlength{\columnseprule}{3mm}
\setlength{\parindent}{0.0cm}
\newcommand{\background}[3]{
  \newrgbcolor{cgradbegin}{#1}
  \newrgbcolor{cgradend}{#2}
  \psframe[fillstyle=gradient,gradend=cgradend,
  gradbegin=cgradbegin,gradmidpoint=#3](0.,0.)(1.\textwidth,-1.\textheight)
}
\newenvironment{poster}{
  \begin{center}
  \begin{minipage}[c]{0.98\textwidth}
}{
  \end{minipage} 
  \end{center}
}
\newenvironment{pcolumn}[1]{
  \begin{minipage}{#1\textwidth}
  \begin{center}
}{
  \end{center}
  \end{minipage}
}
\newrgbcolor{lcolor}{0. 0. 0.80}
\newrgbcolor{gcolor1}{1. 1. 1.}
\newrgbcolor{gcolor2}{.80 .80 1.}

\newcommand{\pbox}[4]{
\psshadowbox[#3]{
\begin{minipage}[t][#2][t]{#1}#4
\end{minipage}
}}
\begin{document}

\background{1. 1. 1.}{1. 1. 1.}{0.5}

\vspace*{2cm}


\newrgbcolor{lightblue}{0. 0. 0.80}
\newrgbcolor{white}{1. 1. 1.}
\newrgbcolor{whiteblue}{.80 .80 1.}
\pagecolor{whiteblue}
\def\bordercolor{lightblue}

\begin{poster}
\begin{document

\end{multicols}
\end{poster}
\end{document}

[localghost]

Just for information to other users for awareness of possibly already existing solutions. The question has also been posted to {TeX} SX and already received some useful comments. Please read what our administrator thinks about that.

A crossposting is always contra-productive. But there is nothing really against it as long as it is mentioned. This means that a direct link has to be added. So other users who want to help are preserved from double efforts and waste of time.

Furthermore the example is not compilable. Please always check the examples posted here for functionality in order to give an adequate problem description.