change paper size of Elena's custom tikzposter

Question

I am using Elena's tikzposter (http://www.inf.unibz.it/~ebotoeva/fancytikzposter.html) and would like to change the poster size to A1, not A0. Is there a way to do this? I tried changing the geometry, but the font does not scale with the changes. Everything becomes out of place. Is there a way to scale it accordingly? I have not changed much from the template, just added my text and some figures as well as the following:

\setmargin{1}
\setblockspacing{.85}
\setblocktitleheight{1}
\usetemplate{N3}
\setheaddrawingheight{10}

\usepackage{hyperref}
\usepackage[version=4]{mhchem}
\usepackage{caption}
\usepackage{fixltx2e}
\usepackage{siunitx}
\usepackage{graphicx}
\usepackage[margin=\margin cm, paperwidth=59.4cm, paperheight=84.1cm]{geometry}

Thanks for your help.

Answer 1

This is surprisingly easy:

Instead of using \documentclass[a0paper]{tikzposter} use\documentclass[a1paper]{tikzposter}.