[Tex/LaTex] Vertical space before section title with titlesec

fontsizesectioningspacingtitlesec

I was trying to eliminate the vertical space before and after the title of a section by using the titlesec package and the command \titlespacing*{\section}{0pt}{0pt}{0pt}, but it works only in eliminating the vertical space after the section title. Before the section title there still is a portion of double space. I've searched the database and didn't find a solution.

Best Answer

Don't switch to \normalsize inside the argument of \section; use titlesecs \titleformat macro instead.

\documentclass[12pt]{extarticle}

\usepackage{setspace}
\onehalfspacing

\usepackage[compact]{titlesec}
\titleformat{\section}{\normalfont\bfseries}{\thesection}{1em}{}
\titlespacing*{\section}{0pt}{*0}{0pt}

\begin{document}

\section*{LOT}

The LOT hypothesis

\section*{The Regress Argument}

RA

\end{document}

enter image description here

Related Solutions

[Tex/LaTex] Titlesec: remove space after empty margin section

This is a very interesting layout. Try the following code. A boolean is hooked to the \everypar. This means that if there is plain paragraph first it is set to false and the next subsection will have normal spacing. Note also the strange place where the \secskip command end up, but it seems to work.

EDIT 1: Restore original \everypar and remove vertical space of \lastskip before moving subsection up. Remove all glue and add \raggedbottom to prevent stretching.

EDIT 2: It looks if the additional vertical spacing is \baselineskip

\usepackage{titlesec}
\makeatletter
\newif\ifaftersec\aftersecfalse

\newcommand\setsubskip{%
    \global\aftersectrue
    \everypar{%
        \global\aftersecfalse
        \if@noskipsec
            \global\@noskipsecfalse
            \clubpenalty\@M
            \hskip-\parindent
            \begingroup
                \@svsechd\unskip{\hspace{\@tempskipb}}%
            \endgroup
        \else
            \clubpenalty\@clubpenalty\everypar{}%
        \fi}}

\newcommand\subskip{%
  \ifaftersec
     \removelastskip%         EDIT 2
     \vspace{-\baselineskip}% EDIT 2 ??????????????
  \fi
  \global\aftersecfalse}

\titleformat{\section}[leftmargin]{\raggedright\scshape}{}{0pt}{}[\setsubskip]
\titlespacing*{\section}{2.5cm}{2.5ex}{0.5cm}

\titleformat{\subsection}{\subskip\bfseries}{}{0pt}{}[]
\titlespacing*{\subsection}{0pt}{2ex}{1ex}

\raggedbottom
\makeatother

enter image description here

[Tex/LaTex] Remove spacing above section in titlesec

UPDATED ANSWER

Do \usepackage[nostruts]{titlesec}, which will remove the struts like my answer below did.

The feature was added with version 2.11, released 2019-07-16.

ORIGINAL ANSWER

The package titlesec adds \strut in some places. In your case you have to defeat this behavior in three places:

\documentclass[11pt]{article}
\usepackage{geometry}
\geometry{margin=5mm, paper=a6paper, showframe=true}

\usepackage{titlesec}
\usepackage{etoolbox}
\makeatletter
\patchcmd{\ttl@select}{\strut}{}{}{}
\patchcmd{\ttlh@hang}{\strut}{}{}{}
\patchcmd{\ttlh@hang}{\strut}{}{}{}
\makeatother

\titleformat*\section{\Large}
\titleformat*\subsection{\large}

\usepackage{lipsum}
\begin{document}

\section*{Using titlesec}
\subsection*{Lorem Ipsum}
\lipsum[3]
\end{document}

The macros involved are \ttl@select and \ttlh@hang (in the second one \strut appears twice. If other styles are selected it may be necessary to patch \ttlh@display or \ttlh@runin.