# Override small-caps \chapter locally

When I customise the \chapter format using titlesec as follows (important bit is the \bfseries for small caps):

\titleformat{\chapter}[block]
{\thesection\enspace}{0pt}{}[\vspace{2pt}{\titlerule[1pt]}]
\titlespacing{\chapter}%
{0mm}% How much of \titlerule line to remove from left
{8mm}% Before \titlerule
{0mm}% After \titlerule


and then in one \chapter title I’d like to change a word or two (plus points for possibility to include a \\) the case to lower-case, what should I do?

I’ve found this question, but I could not make it work. Not even the textcase of @DavidCarlisle helped me.

\chapter*{Veľkonočná nedeľa\\ \MakeTextLowercase{alebo}\\ Nedeľa Pánovho zmŕtvychvstania}%

\chapter*{Sobota\\ \MakeTextLowercase{po Piatej pôstnej nedeli}}%

• Would it be an unnumbered chapter? – Bernard Apr 26 at 15:53
• In this particular case, yes. Otherwise, it would be nice to have as independent solution as possible (like loading a package). However, any solution is welcome. :) – tukusejssirs Apr 26 at 16:00
• You can use \titleformat inside the body of the document,, inside a group. For unnumbered chapters, you have the numberless key. – Bernard Apr 26 at 16:06
• It is necessary to know what font package you're using. – egreg Apr 26 at 16:29
• @egreg, I use Libertinus Serif font (package libertinus), as use could see in all my other questions). – tukusejssirs Apr 26 at 16:34

You need to reset the “secondary shape” axis to standard; it is defined by the fontaxes package in order to allow for variations in small caps.

\documentclass[a4paper]{book}
\usepackage[T1]{fontenc}
\usepackage[slovak]{babel}

\usepackage{titlesec}

\usepackage{libertinus}

\titleformat{\chapter}[block]
{\thesection\enspace}
{0pt}
{}
[\vspace{2pt}{\titlerule[1pt]}]
\titlespacing{\chapter}%
{0mm}% How much of \titlerule line to remove from left
{8mm}% Before \titlerule
{0mm}% After \titlerule

\begin{document}

\let\cleardoublepage\relax % just to make both titles go in the same page

\chapter*{Veľkonočná nedeľa\\ \textulc{alebo}\\ Nedeľa Pánovho zmŕtvychvstania}

\chapter*{Sobota\\ \textulc{po Piatej pôstnej nedeli}}

\end{document}


With XeLaTeX you just need \textup:

\documentclass[a4paper]{book}
\usepackage[T1]{fontenc}
\usepackage[slovak]{babel}

\usepackage{fontspec}
\usepackage{titlesec}

\setmainfont{Libertinus Serif}

\titleformat{\chapter}[block]
{\thesection\enspace}
{0pt}
{}
[\vspace{2pt}{\titlerule[1pt]}]
\titlespacing{\chapter}%
{0mm}% How much of \titlerule line to remove from left
{8mm}% Before \titlerule
{0mm}% After \titlerule

\begin{document}

\let\cleardoublepage\relax

\chapter*{Veľkonočná nedeľa\\ \textup{alebo}\\ Nedeľa Pánovho zmŕtvychvstania}

\chapter*{Sobota\\ \textup{po Piatej pôstnej nedeli}}

\end{document}

• You say to use fontaxes package, however, you did not included it in the example—have you forgotten it to include? :) – tukusejssirs Apr 26 at 16:50
• Indeed, from my tests, this code does not work without including fontaxes. And I was misleading in one one comments, when I said that I use libertinus package. I use that font, but I don’t include that as a package, but I use this command instead: \setmainfont{Libertinus Serif}, for which we need to include fontspec package. The textcase package is not necessary. – tukusejssirs Apr 26 at 16:59
• @tukusejssirs You should be more specific. I assumed pdflatex. – egreg Apr 26 at 16:59
• I’m sorry, @egreg, however, I assumed you checked the tags. :) – tukusejssirs Apr 26 at 17:00
• @tukusejssirs The tag is there, but you said you use the package libertinus. Anyway, with fontspec it's even easier: use \textup. – egreg Apr 26 at 17:04

As @Bernard suggested, I could use \titleformat anywhere in the document, not only in the preamble. So I simply created a new command (I named it \chapterOther), where I placed the \titleformat command without \scshape, then called the \chapter, and finally I re-formatted the \chapter with the original \titleformat command. All of this I placed into the preamble:

\newcommand{\chapterOther}[1]{%
\titleformat{\chapter}[block]%
{\thesection\enspace}{0pt}{}[\vspace{2pt}{\titlerule[1pt]}]%
\titlespacing{\chapter}%
{0mm}% How much of \titlerule line to remove from left
{8mm}% Before \titlerule
{0mm}% After \titlerule

\chapter*{#1}%

\titleformat{\chapter}[block]

\chapterOther{\textsc{Veľkonočná nedeľa}\\ alebo\\ \textsc{Nedeľa Pánovho zmŕtvychvstania}}