What do I need to change in here to make convert the size of the poster to A2 or will what I have work?
\documentclass[10pt,a2paper,landscape]{beamer}
\usepackage[scale=1.24]{beamerposter}
%\usepackage[size=custom,width=594mm,height=420mm,scale=1]{beamerposter}
\usetheme{confposteralt}
\setbeamercolor{block alerted title}{fg=Goldenrod,bg=blue!70} % Colors of the highlighted block titles
\setbeamercolor{block alerted body}{fg=black,bg=blue!10}
%-----------------------------------------------------------
% Define the column widths and overall poster size
% To set effective sepwid, onecolwid and twocolwid values, first choose how many columns you want and how much separation you want between columns
% In this template, the separation width chosen is 0.024 of the paper width and a 4-column layout
% onecolwid should therefore be (1-(# of columns+1)*sepwid)/# of columns e.g. (1-(4+1)*0.024)/4 = 0.22
% Set twocolwid to be (2*onecolwid)+sepwid = 0.464
% Set threecolwid to be (3*onecolwid)+2*sepwid = 0.708
\newlength{\sepwid}
\newlength{\onecolwid}
\newlength{\twocolwid}
\newlength{\threecolwid}
\setlength{\paperwidth}{48in} % A0 width: 46.8in
\setlength{\paperheight}{36in} % A0 height: 33.1in
\setlength{\sepwid}{0.024\paperwidth} % Separation width (white space) between columns
\setlength{\onecolwid}{0.22\paperwidth} % Width of one column
\setlength{\twocolwid}{0.464\paperwidth} % Width of two columns
\setlength{\threecolwid}{0.708\paperwidth} % Width of three columns
\setlength{\topmargin}{-0.5in} % Reduce the top margin size
Thank you in advance.