To get it in A1 format, replace the line
\usepackage[scale=1.24]{beamerposter}
with
\usepackage[scale=0.78,size=a1]{beamerposter}
\setlength{\paperwidth}{33.1in}
\setlength{\paperheight}{23.4in}
For the first half of your question:
I think your left and right margin were in fact already of the same size, the problem is, that the sum of all your columns and spaces was bigger than the available space, so that the left side was intruding the margin.
You can try and add \begin{columns}[t, totalwidth=\textwidth]
and modify the size of your columns via editing \setlength{\onecolwid}{0.20\paperwidth}
etc.
\documentclass[final]{beamer}
\usepackage[scale=0.78, size=a1]{beamerposter}
\usetheme{confposter}
\setbeamercolor{block alerted title}{fg=white,bg=dblue!70}
\setbeamercolor{block alerted body}{fg=black,bg=dblue!10}
%-----------------------------------------------------------
\newlength{\sepwid}
\newlength{\onecolwid}
\setlength{\paperwidth}{33.1in} % A0 width: 46.8in
\setlength{\paperheight}{23.4in} % A0 height: 33.1in
\setlength{\sepwid}{0.02\paperwidth} % Separation width (white space) between columns
\setlength{\onecolwid}{0.20\paperwidth} % Width of one column
%-----------------------------------------------------------
\title{Title} % Poster title
\author{Blah Blah} % Author(s)
\institute{Department, University} % Institution(s)
\begin{document}
\begin{frame}[t]
\begin{columns}[t, totalwidth=\textwidth]
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\end{columns}
\end{frame}
\end{document}
Second part of your question:
This is only a quick and dirty solution, but if you adjust a bit the fontsizes and spaceings, you should be able to get the desired look
First you have to comment out the headline in beamerthemeconfposter.sty
, e.g. the lines 192 to 211.
\documentclass[final]{beamer}
\usepackage[scale=0.78, size=a1]{beamerposter}
\usetheme{confposter}
\setbeamercolor{block alerted title}{fg=white,bg=dblue!70}
\setbeamercolor{block alerted body}{fg=black,bg=dblue!10}
%-----------------------------------------------------------
\newlength{\sepwid}
\newlength{\onecolwid}
\setlength{\paperwidth}{33.1in} % A0 width: 46.8in
\setlength{\paperheight}{23.4in} % A0 height: 33.1in
\setlength{\sepwid}{0.02\paperwidth} % Separation width (white space) between columns
\setlength{\onecolwid}{0.20\paperwidth} % Width of one column
%-----------------------------------------------------------
\definecolor{headingcol}{rgb}{0.5,0.7,1} %Colour of main title
\definecolor{boxcol}{rgb}{0.7,0.2,0.2} %Edge-colour of box and top banner
\fboxsep=1cm
\usepackage{graphicx} % Required for including images
\usepackage{textpos}
\title{Title} % Poster title
\author{Blah Blah} % Author(s)
\institute{Department, University} % Institution(s)
\begin{document}
\begin{frame}[t]
\setlength{\unitlength}{1mm}
\begin{picture}(0,0)(0,0)
\put(-13,-50){
\begin{minipage}[t][0mm][c]{0mm}
\includegraphics[width=\paperwidth]{Black_Landscape.pdf}
\end{minipage}
}
\put(13,-50){
\begin{minipage}[t][0mm][l]{500mm}
\textcolor{headingcol}{\sffamily \fontsize{92}{48} \selectfont \textbf{\inserttitle}}\\[1.5cm]
\textcolor{white}{\sffamily \fontsize{48}{48} \selectfont \textbf{\insertauthor}}\\[0.5cm]
\textcolor{white}{\sffamily \fontsize{48}{48} \selectfont \textbf{\insertinstitute}}
\end{minipage}
}
\end{picture}
\vspace{13cm}
\begin{columns}[t, totalwidth=\textwidth]
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\begin{column}{\onecolwid}
\begin{alertblock}{test}
\end{alertblock}
\end{column}
\begin{column}{\sepwid}
\end{column}
\end{columns}
\end{frame}
\end{document}
Best Answer
This is my suggestion.
Leave the line
as it is and add the following lines
just after the line
In this way you will have the same document as before, but with
a2 landscape
size.Output:
and these are the properties of the
pdf
file as shown by the viewerthat is to say
a2 landscape
.Note that the new layout
resize and center
is obtained from the standardresize to
with some adjusting to the center point, so to obtain the right positioning of the poster.