there is the same question of mine here:the same problem
i need a consistent double spacing throughout the whole thesis. i cannot use double spacing in \usepackage[doublespacing]{setspace} as it messes up the whole title part.
i modified my code, but the vertical distance between the chapter 1 and The title ONE (for example) still is not double space. For abstract chapter, i had to enter the \doublespacing command in the abstract.tex file.
could you tell me where is the mistake?
\documentclass[12pt,oneside,letterpaper,chapterprefix=on,numbers=noenddot]{scrbook}
%%%page set-up
\setcounter{secnumdepth}{4}
\usepackage[margin=1in,includefoot,heightrounded]{geometry}%1 inch margins
\usepackage{mathptmx} %times new roman
\usepackage{setspace}%double spacing in text, not captions or footnotes
\usepackage{indentfirst} %indent first paragraph
\setlength{\parindent}{2em} %adjust indentation
\usepackage[document]{ragged2e} %ragged right
\setlength{\RaggedRightParindent}{\parindent}
\usepackage{comment}% a convenient package
\pagestyle{plain}%remove headers
\usepackage[justification=raggedright,singlelinecheck=false,labelsep=period]{caption}
%captions left justify
\setkomafont{captionlabel}{\bfseries}%make caption label bold
\setkomafont{caption}{\bfseries}%make caption bold
\setcapindent{0pt}%removes hanging indent from captions
\usepackage{caption}
\captionsetup{figurename=FIGURE,tablename=TABLE}
%%% bibliography modifications
\usepackage[square,sort,comma,numbers]{natbib}
\setlength{\bibsep}{\baselineskip}%line spacing between citations
\setlength{\bibhang}{2em}%%%hanging identation
\makeatletter
\renewcommand\NAT@bibsetnum[1]{\settowidth\labelwidth{\@biblabel{#1}}%
\setlength{\leftmargin}{\bibindent}\addtolength{\leftmargin}%
{\dimexpr\labelwidth+\labelsep\relax}%
\setlength{\itemindent}{-\bibindent}%
\setlength{\listparindent}{\itemindent}
\setlength{\itemsep}{\bibsep}\setlength{\parsep}{\z@}%
\ifNAT@openbib
\addtolength{\leftmargin}{\bibindent}%
\setlength{\itemindent}{-\bibindent}%
\setlength{\listparindent}{\itemindent}%
\setlength{\parsep}{0pt}%
\fi
}
\makeatother
%%% extra code for getting the correct line spacing after references title
\let\oldbibliography\bibliography %store \bibliography in \oldbibliography
\renewcommand{\bibliography}[1]{{ %
\let\chapter\section %copy\ section over\ chapter
\oldbibliography{#1}}} %old\ bibliography
%%% uppercase chapters
\makeatletter
%\renewcommand\sectionlinesformat[4]{%
% \@hangfrom{\hskip#2 #3}{\MakeUppercase{#4}}%
%}
\renewcommand\chapterlinesformat[3]{%
\@hangfrom{#2}{\MakeUppercase{#3}}%
}
\makeatother
\renewcommand\chapterlineswithprefixformat[3]{%
\MakeUppercase{#2#3}%
}
%%% continuous table and figure numbering
\usepackage{chngcntr}
\counterwithout{figure}{chapter}
\counterwithout{table}{chapter}
%%% chapter titles%%% THIS PART HAS BEEN MODIFIED TO ADJUST VERTICAL DISTANCE TO DOUBLE
\let\raggedchapter\centering
\RedeclareSectionCommand[
beforeskip=0pt,
afterskip=0pt]{chapter}
\renewcommand*{\chapterheadstartvskip}{\vspace*{-\baselineskip}}
\renewcommand*{\chapterheadendvskip}{\vspace*{0in}}
\renewcommand*{\chapterformat}{\chapappifchapterprefix{\nobreakspace}\thechapter}
\setkomafont{disposition}{\bfseries\normalsize}
\setkomafont{chapter}{\normalsize}
\makeatletter
\renewcommand*{\@@makechapterhead}[1]{\chapterheadstartvskip
{%
\setlength{\parindent}{\z@}\setlength{\parfillskip}{\fill}%
\normalfont\sectfont\nobreak\size@chapter{}%
\if@chapterprefix
\let\@tempa\raggedsection
\else
\let\@tempa\@hangfrom
\fi
\@tempa{\ifnum \c@secnumdepth >\m@ne%
\if@mainmatter
\if@chapterprefix
\expandafter\size@chapterprefix
\else
\expandafter\size@chapter
\fi
{\chapterformat}%
\if@chapterprefix
\size@chapterprefix{}\endgraf\nobreak%\vskip\baselineskip
\fi
\fi
\fi
}%
{\raggedsection \interlinepenalty\@M\size@chapter{#1}\par}}%
\nobreak\chapterheadendvskip
}
\makeatother
%%% section titles
\let\raggedsection\centering
\setkomafont{section}{\normalsize}
\RedeclareSectionCommand[
beforeskip=0pt,
afterskip=0.01pt]{section}
%%% subsection title
\let\raggedsubsection\centering
\setkomafont{subsection}{\normalsize}
\RedeclareSectionCommand[
beforeskip=0pt,
afterskip=0.01pt]{subsection}
%%% subsubsection titles
\let\raggedsubsubsection\centering
\setkomafont{subsubsection}{\normalsize}
\RedeclareSectionCommand[
beforeskip=0pt,
afterskip=0pt]{subsubsection}
%%% remove identation from captions
\usepackage{etoolbox}
\AtBeginEnvironment{figure}{\setlength{\RaggedRightParindent}{0em}}
\AtBeginEnvironment{table}{\setlength{\RaggedRightParindent}{0em}}
\patchcmd{\thebibliography}{\chapter*}{}{}
%%%modify table of contents
\usepackage{tocloft}
\renewcommand{\cftchapaftersnum}{.} %place a period after chapter numbers
\setlength{\cftbeforetoctitleskip}{0pt} %keep at 1 inch margin
\setlength{\cftaftertoctitleskip}{0pt} % keep the double spacing
\renewcommand*\contentsname{TABLE OF CONTENTS} % rename contents
\renewcommand{\cfttoctitlefont}{\hspace*\fill}{\normalsize\bfseries}%keep consistent font size
\renewcommand{\cftaftertoctitle}{\hspace*{\fill}} %center title
\KOMAoptions{toc=chapterentrydotfill} %dotted chapter entries
\setkomafont{chapterentry}{} %make chapter titles not bold
\addtokomafont{chapterentrypagenumber}{\mdseries} %make page numbers not bold
%%% indents numbered chapters
\RedeclareSectionCommand[tocnumwidth=3.5em]{chapter}
\renewcommand\addchaptertocentry[2]{%
\ifstr{#1}{}{%
\addtocentrydefault{chapter}{#1}{#2}%
}{%
\addtocentrydefault{chapter}{\hspace*{2em}#1}{#2}%
}}
%%% list of tables
\setlength{\cftbeforelottitleskip}{0pt} % keep at 1 inch margin
\setlength{\cftafterlottitleskip}{0pt} %keep the double spacing
\renewcommand*\listtablename{LIST OF TABLES} %rename contents
\renewcommand{\cftlottitlefont}{\hspace*{\fill}\normalsize\bfseries} %keep consistent font size
\renewcommand{\cftafterlottitle}{\hspace*{\fill}}%center title
\setlength{\cfttabindent}{0pt} % remove indentation from tables in lot
%%% list of figures
\setlength{\cftbeforeloftitleskip}{0pt} % keep at 1 inch margin
\setlength{\cftafterloftitleskip}{0pt} %keep the double spacing
\renewcommand*\listfigurename{LIST OF FIGURES} % rename contents
\renewcommand{\cftloftitlefont}{\hspace*{\fill}\normalize\bfseries}% keep consistent font size
\renewcommand{\cftafterloftitle}{\hspace*{\fill}} %center title
\setlength{\cftfigindent}{0pt} % remove identation from figures in 1of
%%% set up appendix
%\ usepackage[page,toc,title]{appendix}
%\renewcommand{\appendixtocname}{APPENDICES}
\usepackage[toc,title]{appendix}
\renewcommand{\appendixtocname}{APPENDIX: EXAMPLE OF AN APPENDIX}
\renewcommand{\appendixpagename}{\vspace*{\fill}\centering\normalsize
APPENDICES\vspace*{\fill}}
%%% Figure packages
\usepackage{graphicx}
\graphicspath{{figures/}}
\usepackage{wrapfig}
\usepackage{pdfpages}
\usepackage{subcaption} % allows side by side figures
\usepackage{amsmath}
\usepackage{hyperref}
\hypersetup{
colorlinks,
citecolor=black,
linkcolor=black,
urlcolor=black}
%%%---------------------------------------------------------------------
%%%-----------------------------------------------------------
%%%------------------------------------------------------------
\title{Cognitive}
\author{
A THESIS
Committe Members:\\
First Last, Ph.D.\\
First Last, Ph.D.\\
First Last, Ph.D.\\
College Designee:\\
}
\date{June 2017}
\begin{document}
\frontmatter
\maketitle
\setcounter{page}{2} % start page number with 2
\chapter{ABSTARCT}
\input{chapters/abstract}
\chapter{Acknowledgement}
\input{chapters/acknowledgements}
\clearpage
\tableofcontents
\mainmatter
\clearpage
\chapter{ONE}
\input{chapters/chapter01}
\chapter{TWO}
\input{chapters/chapter02}
\end{document}
THANK YOU

\RedeclareSectionCommandto change the skips of\chapter, but then you redefine the commands, that should use these values to not use them; you usetocloftbut also redefine\l@chapterusing\RedeclareSectionCommand. BTW: If you redefine\@@makechapterhead, all distances in the chapter head are because of your definition. So maybe first of all you should cleanup your code. BTW: Your example is not working. – Schweinebacke Jun 08 '17 at 06:06