Currently used format (small margins)
\documentclass[a4paper,11pt]{report}
\usepackage{graphicx}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{appendix}
\usepackage{verbatim}
\setlength\topmargin{0mm}
\setlength\headheight{0mm}
\setlength\headsep{0mm}
\setlength\textheight{237mm}
\setlength\textwidth{170mm}
\setlength\oddsidemargin{0mm}
\setlength\evensidemargin{0mm}
\setlength\parindent{6.5mm}
\setlength\parskip{6.5mm}
\begin{document}