Adding the word "Appendix" for all the Appendices chapters using the quotchap package

Question

I am using the quotchap package and for all the Appendices, I want to add the word "Appendix" before the appendix number e.g. Appendix A instead of A. My problem is shown in the picture below

I need assistance on how to obtain the following output:

Below is my MWE:

\documentclass[11pt,openany,twoside]{book}
\raggedbottom
\let\cleardoublepage=\clearpage
\usepackage[left=2.5cm, right=2.5cm, top=3cm, bottom=3cm,a4paper]{geometry}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[table]{xcolor}
\usepackage{graphicx}
\newcommand\HRule{\noindent\rule{\linewidth}{1.5pt}}
\usepackage[dotinlabels]{titletoc}
\usepackage{background}
\backgroundsetup{contents={}}
\usepackage{fancyhdr}
\usepackage{hhline}
\pagestyle{fancy} 
\usepackage[noindentafter,calcwidth]{titlesec}
\usepackage[courier]{quotchap}
\usepackage{helvet}
\renewcommand\sectfont{\bfseries}
\usepackage{calc,pifont} 
\usepackage{multirow}
\newcommand*\myheaderfooterfont{\normalfont\bfseries}
\usepackage[nottoc]{tocbibind}
\usepackage[ragged]{sidecap}
\usepackage[marginal]{footmisc}
\renewcommand\footnoterule{\vspace*{-3pt}%
    \hrule width 2in height 1.4pt \vspace*{2.6pt}}
\setlength\footnotemargin{10pt}
\usepackage{etoolbox}
\usepackage{regexpatch}
\usepackage{listings}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
}
\usepackage[toc,header]{appendix}
\usepackage{apptools}
\begin{document} 
        \frontmatter
\chapter*{Ac}
\addcontentsline{toc}{chapter}{Ac}
\mainmatter
\setcounter{tocdepth}{1}
\chapter{Backrre}
\begin{appendices}
    \renewcommand{\chaptername}{Appendix}
    \chapter{Derivation of X}
    The contents...
    \chapter{Derivation of Y}
    Another content...
\end{appendices}
\backmatter
\bibliography{}
\end{document}

The quotechap package does not use the \chaptername in its definition of \chapter. You need to revise some of the quotechap chapter related macros in your preamble. — Peter Wilson, Jul 08 '22 at 17:38

Simon Dispa · Accepted Answer · 2022-07-09T12:42:22.203

This code modifies the \@makechapterhead macro of the quotchap package to add the word Appendix to appendices (A to D).

% !TeX TS-program = pdflatex
\documentclass[11pt,openany,twoside]{book}

\usepackage[T1]{fontenc}% added <<<<<<
\raggedbottom
\let\cleardoublepage=\clearpage
\usepackage[left=2.5cm, right=2.5cm, top=3cm, bottom=3cm,a4paper]{geometry}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[table]{xcolor}
\usepackage{graphicx}
\newcommand\HRule{\noindent\rule{\linewidth}{1.5pt}}
\usepackage[dotinlabels]{titletoc}
\usepackage{background}
\backgroundsetup{contents={}}
\usepackage{fancyhdr}
\usepackage{hhline}
\pagestyle{fancy} 
\usepackage[noindentafter,calcwidth]{titlesec}
\usepackage[courier]{quotchap}
\usepackage{helvet}
\renewcommand\sectfont{\bfseries}
\usepackage{calc,pifont} 
\usepackage{multirow}
\newcommand\myheaderfooterfont{\normalfont\bfseries}
\usepackage[nottoc]{tocbibind}
\usepackage[ragged]{sidecap}
\usepackage[marginal]{footmisc}
\renewcommand\footnoterule{\vspace{-3pt}%
    \hrule width 2in height 1.4pt \vspace*{2.6pt}}
\setlength\footnotemargin{10pt}
\usepackage{etoolbox}
\usepackage{regexpatch}
\usepackage{listings}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    linkcolor=blue,
}
\usepackage[toc,header]{appendix}
\usepackage{apptools}
\usepackage{showframe}
%************************************************** added
\usepackage{xstring}
\newcommand{\appname}{{\fontfamily{phv}\fontsize{22pt}{26pt}\selectfont\raisebox{1em}{\textcolor{red}{Appendix}}}} % set the appendix name <<<<<<<<<<<

\makeatletter

    \patchcmd{@makechapterhead}{\thechapter}{%
     \IfSubStr{ABCDEFGHIJKLMNOPQRSTUVWXYZ}{\thechapter}{\appname,\thechapter}{\thechapter}
    }

\makeatother

%**************************************************
\begin{document} 
    \frontmatter
    \chapter*{Ac}
    \addcontentsline{toc}{chapter}{Ac}
\mainmatter
\setcounter{tocdepth}{1}
\chapter{Backrre}

\begin{appendices}
    \chapter{Derivation of X}
    The contents...
    \chapter{Derivation of Y}
    Another content...
    \setcounter{chapter}{15}
    \chapter{Derivation of P}
    \setcounter{chapter}{25}
    \chapter{Derivation of Z}
    Another content...      
\end{appendices}

\backmatter     

%   \bibliography{}
\end{document

UPDATE after follow up question.

What if I have I have Appendices from A-M? Is there a way of automating the code such that whenever the Chapters are in letters of the alphabet, i.e Appendix A, B, C,... then we automatically have Appendix G, H,... for example? — itc, Jul 08 '22 at 20:52
@itc Of course. If all else meets your requirements, I'll add the full alphabet as an update. — Simon Dispa, Jul 08 '22 at 20:56
you can edit the code so that it automatically deals with the issue I have mentioned in my comment above. — itc, Jul 08 '22 at 21:00
@itc Done! Please check the new code. Thank you for your feedback! — Simon Dispa, Jul 08 '22 at 21:23
Thank you very much @Simon Dispa, the code is now working perfectly. And just out of curiosity, lets say I want to do the same for the main chapters, what changes should I make to the solution you posted above? — itc, Jul 08 '22 at 21:28
@itc I think it can be done, but please ask a new question (it will help other readers) and keep me posted. — Simon Dispa, Jul 08 '22 at 21:31

Adding the word "Appendix" for all the Appendices chapters using the quotchap package

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