My document class
\documentclass[a4paper,openany,article]{memoir}
I want to add Appendix before the number so that \chapter{An appendix} displays Appendix A An appendix and not A An appendix
Alternatively, if I change my document class to
\documentclass[a4paper,openany]{memoir}
and remove chapter so that when calling a \chapter it only numbers
ex. \chapter{Title 1} results in in 1 Title 1
My doc:
\documentclass[a4paper,openany,article]{memoir}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[english]{babel}
\maxsecnumdepth{subsection}
\settocdepth{subsection}
%----------------------------------------------------------
\begin{document}
%-------------------------------
\frontmatter
\pagenumbering{Roman}
\tableofcontents
%-------------------------------
\mainmatter
\chapter{Introduction}
\appendix
\addappheadtotoc
\chapter{Derivations}
\section{Celerity at arbitrary depth}\label{sec:celerity_ar_dep}
\includepdf[pages=59,scale=1,trim = 0mm 0mm 0mm 10cm,clip]{Litteratur/Hydrodynamics2012.pdf}
%-------------------------------
\backmatter
\end{document}

\documentclass{...}and ending with\end{document}. That may seem tedious to you, but think of the extra work it represents for TeX.SX users willing to help you. Help them help you: remove that one hurdle between you and a solution to your problem. – jub0bs Nov 19 '13 at 21:02\input. Also, your code contains loads of packages that are irrelevant to your problem. What we need is a minimal working example (MWE). – jub0bs Nov 19 '13 at 21:10\usepackages. – jub0bs Nov 19 '13 at 21:23