I have a tex file containing lots of standard settings such as packages to be included and various other options. How do I tell Org mode to use only the settings from that TeX file?
i.e. for all practical purposes, the org-document should only export to a tex file the part between \begin{document}...\end{document}
whereas the other document settings such as what documentclass and packages to use are borrowed directly from the .tex file. By default Org creates the preamble
like
\documentclass[11pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage{grffile}
\usepackage{amssymb}
..
which I don't want