I need to attach the supporting documents related to the thesis, each category under a separate title cover page. I have tried to make a basic format, however, it is not looking good. My code is dirty, but may give an idea of the situation. There is no pre-specified format. Although I have commented the PDF attachments, but they will be present in the actual document ( That did not create any problem as such). The only restriction is that the design should not affect other pages in the thesis.
\documentclass[listof=totoc,a4paper,11pt,oneside,chapterprefix=true,sfdefaults=false]{scrbook}
\usepackage{pdfpages}
\usepackage[margin=1in,head=27.2pt]{geometry}
\begin{document}
\addchap{All supporting documents}
\addsec{PhD supporting documents}
\vspace{25mm}
\hrulefill
\vspace{5mm}
\begin{center}
\textbf{Enrollment Certificate\\ \vspace{5mm} Coursework Certificate\\ \vspace{5mm}Registration Certificate\\}
\end{center}
\hrulefill
\vspace{5mm}
%\includepdf[pages={1}]{./Certificates/Enrollment.pdf}
%\includepdf[pages={1}]{./Certificates/Coursework_completion.pdf}
%\includepdf[pages={1}]{./Certificates/Registration.pdf}
\clearpage
\addsec{\Large \bfseries Publication supporting documents}
\vspace{55mm}
\hrulefill
\vspace{5mm}
\begin{center}
{ \huge \bfseries Journals ~\[0.3cm] }
\end{center}
\vspace{5mm}
\hrulefill
%\includepdf[pages={1}]{./Journals/EVOS_Published.pdf}
%\includepdf[pages={1}]{./Journals/wpc.pdf}
%\includepdf[pages={1}]{./Journals/sensors.pdf}
\newpage
\vspace{55mm}
\hrulefill
\vspace{5mm}
\begin{center}
{ \huge \bfseries Conferences ~\[0.3cm] }
\end{center}
\vspace{5mm}
\hrulefill
%\includepdf[pages={1}]{./Conferences/Haldia_cert.pdf}
%\includepdf[pages={1}]{./Conferences/Haldia.pdf}
%\includepdf[pages={1}]{./Conferences/Thermo_cert.pdf}
%\includepdf[pages={1}]{./Conferences/Thermometer.pdf}
%\includepdf[pages={1}]{./Conferences/Brainware_cert.pdf}
%\includepdf[pages={1}]{./Conferences/Brainware.pdf}
\newpage
\vspace{15mm}
\hrulefill
\vspace{5mm}
\begin{center}
{ \huge \bfseries Book Chapters ~\[0.3cm] }
\end{center}
\hrulefill
\vspace{5mm}
%\includepdf[pages={1}]{./Books/Book1.pdf}
%\includepdf[pages={1}]{./Books/Book2.pdf}
\newpage
\vspace{15mm}
\hrulefill
\vspace{5mm}
\begin{center}
{ \huge \bfseries International Patents and recognition ~\[0.3cm] }
\end{center}
\hrulefill
\vspace{5mm}
%\includepdf[pages={1}]{./Patents/Patent Certificate1.pdf}
%\includepdf[pages={1}]{./Patents/Patent Certificate2.pdf}
%\includepdf[pages={1}]{./Patents/SA Patent Certificate.pdf}
%\includepdf[pages={1}]{./Patents/TOI.pdf}
\end{document}



\addsec, a different size of font and different vertical spacing for 'Publication supporting documents', so of course it will look different? Are you sure you want to usegeometrywith this class? See the documentation for reasons you maybe shouldn't. – cfr Sep 20 '23 at 05:14\noindent\hrulefillinstead. For vertical centering, this answer gives a simple method, but there are also other ways (see other answers to that question). – Willie Wong Sep 20 '23 at 07:32