[Tex/LaTex] KOMA-Script have parskip=full- but no spacing between section title and content

koma-scriptsectioningspacing

When using KOMA-Script, one has \RedeclareSectionCommand available to adjust the spacing before/after section titles, as described in this question.

I want the content of the section to appear on the immediate next line under the section title, without any extra vertical space. The following mwe shows the content as I want it:

\documentclass{scrartcl} 
\begin{document}

\RedeclareSectionCommand[afterskip=1pt]{section} %the magic happens here

\section{Foo}
    This is some text to show off
\section{Bar}
    This is some text to show off
\section{Baz}
    This is some text to show off  
\end{document}

In my actual document however, I use parskip=full- as argument to \documentclass. This has the effect, that there will be an empty line between the section title and the section content, which I don't want. The mwe also shows this behaviour. Every allowed value for parskip with starts with full or half shows this behaviour.

I think this is the normal and expected behaviour, as the german documentation explicitly states that the whitespace preceedes the paragraph.

Because time is an issue right now, I hacked it by putting \vspace*{-\baselineskip} after every \section{}, but this is of course unacceptable for long term use.

How do I get the behaviour of parskip=full- and \RedeclareSectionCommand[afterskip=1pt]{section}, with the exception that I don't want any vertical space between the section title and the corresponsing content?

Best Answer

Update

It is still not recommanded but now possible without patching a command because KOMA-Script version 3.26 introduces two new keys to \RedeclareSectionCommand and \RedeclareSectionCommands: runin and afterindent. Possible values for both keys are bysign, true and false. For more information see the KOMA-Script documentation or eg Adjusting spacing around section/subsection titles with koma-script.

Using the new key runin with value false¹ it is possible to remove the \parskip between the heading and the following text by afterskip=-\parskip.

Example:

\documentclass[parskip=full-]{scrartcl}[2015/10/03]
\RedeclareSectionCommand[
  runin=false,
  afterskip=-\parskip
]{section}

\begin{document}
\section{Foo}
    This is some text to show off

    This is some text to show off
\section{Bar}
    This is some text to show off

    This is some text to show off
\section{Baz}
    This is some text to show off

    This is some text to show off
\end{document}

The (ugly) result is the same as in the original answer below.

¹ Default setting is runin=bysign which results in the same behavior as in the original answer.

Original answer

It is not recommended - see tex.stackexchange.com/a/300541/43317 and komascript.de/node/2039 (German) - but possible with KOMA-Script version 3.19 or newer:

\documentclass[parskip=full-]{scrartcl}[2015/10/03]
\RedeclareSectionCommand[afterskip=1sp]{section} %the magic happens here
\usepackage{xpatch}
\xapptocmd\sectionlinesformat{\vspace*{-\parskip}}{}{\PatchFailed}

\begin{document}
\section{Foo}
    This is some text to show off

    This is some text to show off
\section{Bar}
    This is some text to show off

    This is some text to show off
\section{Baz}
    This is some text to show off

    This is some text to show off
\end{document}

As you can see the result looks weird:

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[Tex/LaTex] Too much space between full paragraph and subequations env

The problem is that the space after foos does not disappear at the line break, because of the \begin{subequations} that follows (I don't know exactly why).

Use \begin{subequations} between paragraphs, or say

\usepackage{etoolbox}
\preto\subequations{\ifhmode\unskip\fi}

In daleif's example the problem is the same: a space remains and makes a new line in the paragraph. However a \label there is only for \pageref usage, so it must be attached to a word, otherwise the reference can be off by one.

[Tex/LaTex] KOMA-Script scrbook: How to change V-space between chapter prefix and title

The scrbook class introduces an additional \vskip of .5\baselineskip between the heading "Chapter" and the title; unfortunately this skip is hard-coded, so you will have to redefine \@@makechapterhead to suppress it:

\documentclass[12pt,letterpaper,oneside,chapterprefix=on]{scrbook}

%Margins
\usepackage[letterpaper,left=1.5in,top=1in,right=1in,bottom=1in]{geometry}

%Type
\usepackage{fontspec}
%\setmainfont{Times New Roman}
\usepackage{unicode-math}
\setmathfont{xits-math.otf}
\usepackage[doublespacing]{setspace}
\setlength\parindent{0.5in}

\usepackage{microtype}
\usepackage{lipsum}

%Remove vertical space above/below chapter headings:
%http://tex.stackexchange.com/questions/43087/remove-space-before-chapter-title-with-koma-      script-scrbook
\renewcommand*{\chapterheadstartvskip}{\vspace*{-\baselineskip}}
\renewcommand*{\chapterheadendvskip}{\vspace*{0in}}
\renewcommand*{\chapterformat}{\chapappifchapterprefix{\nobreakspace}\thechapter}

\setkomafont{disposition}{\normalcolor\rmfamily}
\setkomafont{chapter}{\centering\MakeUppercase}

\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

\begin{document}

\frontmatter

\chapter*{Abstract Title Page}
\chapter*{Abstract}
\chapter*{Copright Page}
\chapter*{Title Page}

\tableofcontents
\listoffigures

\mainmatter

\chapter{Introduction}
\lipsum[1-2]
\appendix
\backmatter

\end{document}

enter image description here

With the etoolbox package, one can do this in one-line patching \@@makechapterhead:

\documentclass[12pt,letterpaper,oneside,chapterprefix=on]{scrbook}

%Margins
\usepackage[letterpaper,left=1.5in,top=1in,right=1in,bottom=1in]{geometry}

%Type
\usepackage{fontspec}
%\setmainfont{Times New Roman}
\usepackage{unicode-math}
\setmathfont{xits-math.otf}
\usepackage[doublespacing]{setspace}
\setlength\parindent{0.5in}

\usepackage{microtype}
\usepackage{etoolbox}
\usepackage{lipsum}

%Remove vertical space above/below chapter headings:
%http://tex.stackexchange.com/questions/43087/remove-space-before-chapter-title-with-koma-      script-scrbook
\renewcommand*{\chapterheadstartvskip}{\vspace*{-\baselineskip}}
\renewcommand*{\chapterheadendvskip}{\vspace*{0in}}
\renewcommand*{\chapterformat}{\chapappifchapterprefix{\nobreakspace}\thechapter}

\setkomafont{disposition}{\normalcolor\rmfamily}
\setkomafont{chapter}{\centering\MakeUppercase}

\makeatletter
\patchcmd{\@@makechapterhead}{\vskip.5\baselineskip}{}{}{}
\makeatother

\begin{document}

\frontmatter

\chapter*{Abstract Title Page}
\chapter*{Abstract}
\chapter*{Copright Page}
\chapter*{Title Page}

\tableofcontents
\listoffigures

\mainmatter

\chapter{Introduction}
\lipsum[1-2]
\appendix
\backmatter

\end{document}

I commented out the line \setmainfont{Times New Roman} since I don't have that font in my system.

As egreg noticed in a comment, with the settings of the question, the heading "Chapter #" is slightly shifted to the left; to correct this, the following additional redefinition had to be added:

\renewcommand*{\chapterformat}{\chapappifchapterprefix{\nobreakspace}\thechapter}

Best Answer

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[Tex/LaTex] Too much space between full paragraph and subequations env

[Tex/LaTex] KOMA-Script scrbook: How to change V-space between chapter prefix and title

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