Btukfyl

Why does subsubsubsection not work for documentclass{scrbook} and how can I force it anyway?

There is a MWE:

documentclass{scrbook}

setcounter{secnumdepth}{3}

begin{document}

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

subsubsubsection{Subsubsubsection}

end{document}

With this MWE a get an error: "undefined control sequence subsubsubsection" and the pdf looks like this:

But I need "1.1.1.1.1. Subsubsubsection" in the last line.

Update (needs KOMA-Script version 3.26b)

The original answer below is still correct. But there are the new command RedeclareSectionCommands, the new options runin and afterindent. And there are some options predefined for new section levels using style=section.

Suggestion 1: Declaring new section level subsubsubsection as a displayed title

documentclass{scrbook}



DeclareNewSectionCommand[

  style=section,

  counterwithin=subsubsection,

  afterskip=1.5ex plus .2ex,

  beforeskip=3.25ex plus 1ex minus .2ex,

  afterindent=false,

  level=paragraphnumdepth,

  tocindent=10em,

  tocnumwidth=5em

]{subsubsubsection}

setcounter{secnumdepth}{subsubsubsectionnumdepth}

setcounter{tocdepth}{subparagraphtocdepth}



RedeclareSectionCommands[

  level=numexprsubsubsubsectionnumdepth+1relax,

  toclevel=numexprsubsubsubsectiontocdepth+1relax,

  increaselevel

]{paragraph,subparagraph}

RedeclareSectionCommand[

  counterwithin=subsubsubsection,

  tocindent=12em,

  tocnumwidth=6em

]{paragraph}

RedeclareSectionCommand[

  tocindent=14em,

  tocnumwidth=7em

]{subparagraph}



usepackage{lipsum}% only for dummy text

begin{document}

tableofcontents

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

subsubsubsection{Subsubsubsection}

lipsum[1-2]

end{document}

Suggestion 2: Redefining paragraph as a displayed title:

documentclass{scrbook}



RedeclareSectionCommand[

  afterskip=1.5ex plus .2ex,

  afterindent=false

]{paragraph}

setcounter{secnumdepth}{paragraphnumdepth}

setcounter{tocdepth}{paragraphtocdepth}



usepackage{lipsum}% dummy text

begin{document}

tableofcontents

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

paragraph{Paragraph}

lipsum[1-2]

end{document}

Original answer

You can declare a new section level subsubsubsection. But then you have to redeclare paragraph and subparagraph to adjust the its levels etc.:

documentclass{scrbook}



DeclareNewSectionCommand[

  style=section,

  counterwithin=subsubsection,

  font=normalsize,

  afterskip=1.5ex plus .2ex,

  beforeskip=-3.25ex plus -1ex minus -.2ex,

  indent=0pt,

  level=4,

  tocstyle=section,

  toclevel=4,

  tocindent=10em,

  tocnumwidth=5em

]{subsubsubsection}

setcounter{secnumdepth}{subsubsubsectionnumdepth}

setcounter{tocdepth}{subsubsubsectiontocdepth}



RedeclareSectionCommand[

  level=5,

  counterwithin=subsubsubsection,

  toclevel=5,

  tocindent=12em,

  tocnumwidth=6em

]{paragraph}

RedeclareSectionCommand[

  level=6,

  toclevel=6,

  tocindent=14em,

  tocnumwidth=7em

]{subparagraph}



usepackage{lipsum}% only for dummy text

begin{document}

tableofcontents

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

subsubsubsection{Subsubsubsection}

lipsum[1-2]

end{document}

If do not use paragraph as a runin title, you can redeclare section level paragraph using a positive value for afterskip:

documentclass{scrbook}



RedeclareSectionCommand[

  afterskip=1.5ex plus .2ex,

  beforeskip=-3.25ex plus -1ex minus -.2ex

]{paragraph}

setcounter{secnumdepth}{paragraphnumdepth}

setcounter{tocdepth}{paragraphtocdepth}



usepackage{lipsum}% dummy text

begin{document}

tableofcontents

chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

paragraph{Paragraph}

lipsum[1-2]

end{document}

The easiest way is to use paragraph and to redefine its formatting:

documentclass{scrbook}

setcounter{secnumdepth}{5}



RedeclareSectionCommand[

    counterwithin=subsubsection,

    toclinefill=hfill,

    tocindent=3.5ex,

    tocnumwidth=1ex,

    tocdynnumwidth=true, 

    tocraggedentrytext=true,

    tocentryformat=fontintocitshape,

    tocpagenumberformat=fontintoc,

    beforeskip=10pt,%

    afterskip=1pt,

    font=normalfontitshape

    ]{paragraph}







    begin{document}



chapter{Chapter}

section{Section}

subsection{Subsection}

subsubsection{Subsubsection}

paragraph{Subsubsubsection}

end{document}

If you want to leave paragraph and subparagraph as is, then you need only new level numbers for it and can then define subsubsubsection:

documentclass{scrbook}

RedeclareSectionCommand[level=6,toclevel=6]{subparagraph}

RedeclareSectionCommand[level=5,toclevel=5]{paragraph}    

DeclareSectionCommand[

  style=section,

  counterwithin=subsubsection,

  font=normalsize,

  afterskip=1ex plus .2ex,

  beforeskip=-3.25ex plus -1ex,

  indent=0pt,

  level=4,

  tocstyle=section,

  toclevel=4,

  tocindent=10em,

  tocnumwidth=5em

]{subsubsubsection}



setcounter{secnumdepth}{subsubsubsectionnumdepth}

setcounter{tocdepth}{subsubsubsectiontocdepth}



usepackage{lipsum}% only for dummy text

begin{document}

    tableofcontents

    chapter{Chapter}

    section{Section}

    subsection{Subsection}

    subsubsection{Subsubsection}

    subsubsubsection{Subsubsubsection}

    lipsum[1-2]

paragraph{foo} lipsum[1]

subparagraph{bar} lipsum[1]

end{document}