我有这个文档模板，其中编号章节是定制的。我怎样才能减少非编号章节中上边距和标题之间的空间。我想通过上移摘要的标题来增加几行。但仅限于特定章节，其他章节都可以。
以下是 MWE：
% *********************** Document Class Definition **********************
\documentclass[twoside,12pt,headings=optiontoheadandtoc]{scrbook}
% ******************** Configure Packages *****************************
\usepackage[a4paper, % showframe,
hmargin=2.5cm, vmargin=3cm,
includefoot=false]{geometry}
\usepackage[main=UKenglish]{babel}
\usepackage[T1]{fontenc}
\usepackage[dvipsnames]{xcolor}
\usepackage[pdftex]{graphicx}
\usepackage{minitoc}
\usepackage{titletoc}
\usepackage{lipsum}
\usepackage{scrlayer-scrpage}
\usepackage{xhfill} %Use in the design for section titles
\usepackage{scrhack}
\usepackage{tikz}
\usetikzlibrary{decorations,
decorations.pathmorphing,
decorations.pathreplacing}
% ---------------------------------------------------------------
\usepackage[sfdefault]{universalis}
%% Define some format spacing--------------------------------------------------------
\setparsizes{1em}{1em plus .1\baselineskip}{0pt plus 1fil}
\renewcommand{\baselinestretch}{1.25}\selectfont
%% Define color used within the template---------------------------------------------
\definecolor{maincolor}{cmyk}{1, .50, .10, .01}
\definecolor{coloraccessory}{cmyk}{.18, .98, .18, 0}
\colorlet{colorfooterpage}{maincolor}
\colorlet{colorfootertitle}{maincolor}
\colorlet{colorfootermark}{coloraccessory}
%% Formating the caption labels for floating elements ------------------------------
\setkomafont{caption}{\normalfont\footnotesize}
\setkomafont{captionlabel}{\color{coloraccessory}\usekomafont{caption}\bfseries}
%% Title format for Chapters -------------------------------------------------------
\newcommand{\ssfont}{\fontfamily{bch}\selectfont} % For font Charter
\newcommand{\thesischapterfont}{\color{maincolor}\normalfont\huge\ssfont}
\newcommand{\thesissectionfont}{\color{maincolor}\normalfont\Large\ssfont}
\newcommand{\thesissubsectionfont}{\color{maincolor}\normalfont\large\ssfont}
\newcommand{\fontfootertext}{\color{colorfootertitle}\normalfont\footnotesize}
\newcommand{\fontfooterpagenumber}{\color{colorfootermark}\normalfont\normalsize\bfseries}
% headings
\setkomafont{chapter}{\thesischapterfont} % for chapter entries
\setkomafont{section}{\thesissectionfont} % for section entries
\setkomafont{subsection}{\thesissubsectionfont} % for section entries
\setkomafont{subsubsection}{\thesissubsectionfont} % for section entries
%% formats: \chapters
\renewcommand*\chapterheadstartvskip{\vspace*{3cm}}
\renewcommand*{\chapterformat}{ \chapternumber{\thechapter} }
\renewcommand{\chapterlinesformat}[3]{ #2\leavevmode\linebreak\chaptertitle{#3} }
\newcommand{\chapternumber}[1]{ \usekomafont{chapter}
\begin{minipage}[t]{1\textwidth}%
\raggedleft{%
{\color{maincolor}\fontsize{60}{60}\selectfont#1}%
}%
\end{minipage}
\begin{tikzpicture}[cap=round,line width=6pt,maincolor]
\draw[line width=2pt ] (0,0) -- (1.0\linewidth,0);
\draw (0.7\linewidth,0) -- (1.0\linewidth,0);
\end{tikzpicture}
}
\newcommand{\chaptertitle}[1]{ \usekomafont{chapter}
\begin{minipage}[t]{1\textwidth}%
\vspace*{0.5cm}
\raggedright%
#1%
\end{minipage}%
}
\renewcommand*\chapterheadendvskip{\vspace*{2cm}}
%% -----------------------------------------------------------------------------------------
% Adjusting spacing around section/subsection titles
\RedeclareSectionCommand[
%runin=false,
afterindent=false,
beforeskip=1.0\baselineskip,
afterskip=0.5\baselineskip]{section}
\RedeclareSectionCommand[
%runin=false,
afterindent=false,
beforeskip=.75\baselineskip,
afterskip=.5\baselineskip]{subsection}
\RedeclareSectionCommand[
%runin=false,
afterindent=false,
beforeskip=.5\baselineskip,
afterskip=.25\baselineskip]{subsubsection}
%% -----------------------------------------------------------------------------------------
%% formats: \section
\renewcommand{\sectionlinesformat}[4]{%
\Ifstr{#1}{section}{%
\parbox[r]{\linewidth}{%
\kern-.75\ht\strutbox\rule{\linewidth}{1.2pt}\par%
\raggedsection{\hskip #2{\color{black}#3}}{#4}\par%
}%
}{%
{\hskip #2#3}{#4}}%
}
%% -----------------------------------------------------------------------------------------
%% formats: \subsection
\renewcommand*{\subsectionformat}{%
\usekomafont{subsection}%
\color{black}\thesubsection\hspace*{10pt}
}
%****************************** Document begins *******************************
\begin{document}
%******************************** Front Matter ********************************
\frontmatter
\pagestyle{plain}
\chapter*{dedication}
\lipsum[1-3]
\chapter*{declaration}
\lipsum[1-3]
\chapter*{Abstract}
\lipsum[1-3]
%*********************** Adding TOC ***********************
\frontmatter
\pagestyle{empty}
\tableofcontents
% ******************************** Main Matter *********************************
\mainmatter
\pagestyle{scrheadings}
% Chapter 1 -----------------------------------
\chapter{Introduction}
\lipsum[1-3]
\section{Nice section title}
\lipsum[1-5]
\section{Very boring section}
\lipsum[1-3]
% Chapter 2 -----------------------------------
\chapter{Optimal Control for Wave Energy Converters: Contributions}
\lipsum[1-3]
\section{Nice section title}
\lipsum[1-5]
\section{Very boring section}
\lipsum[1-3]
\end{document}
总而言之，我想减少这个空间：
而不修改其他未编号的章节。
谢谢您的指导！
答案1
使用\renewcommand*\chapterheadstartvskip{...并 \renewcommand*\chapterheadendvskip{..限制其范围\chapter{abstract}。
例如
{\renewcommand*\chapterheadstartvskip{\vspace*{-1.5cm}}
\renewcommand*\chapterheadendvskip{\vspace*{0cm}}
\chapter*{Abstract}
}
