[Tex/LaTex] How to change header notes font size

fontsfontsizeheader-footer

%----------------------------------------------------------------------------------------
%   HEADERS AND FOOTERS
%----------------------------------------------------------------------------------------

\RequirePackage[markcase=used]{scrlayer-scrpage}
\providepairofpagestyles{thesisSimple}{%
    \clearpairofpagestyles%
    \automark[chapter]{chapter}
    \ihead{\headmark}% Inner header
    \ohead[\pagemark]{\pagemark}% Outer header
}
\ifoot{}% Inner footer
\ofoot{}% Outer footer
\pagestyle{thesisSimple}
\providepairofpagestyles[thesisSimple]{thesis}{%
    \automark*[section]{}%
}
\providepairofpagestyles[thesisSimple]{review}{%
    \ofoot[\shorttitle/\authorname]{\shorttitle/\authorname}
    \ifoot[\today]{\today}
}
\pagestyle{thesis}
\ifbool{headsepline}{\KOMAoption{headsepline}{true}}{}
\PreventPackageFromLoading[\ClassError{\classname}{Package `fancyhdr' is
incompatible\MessageBreak with this class}{The pagesyles are defined 
    using package `scrlayer-scrpage', please consult the\MessageBreak 
KOMA-script documentation for details.}]{fancyhdr}


\NewDocumentCommand{\blank@p@gestyle}{}{empty}
\NewDocumentCommand{\blankpagestyle}{ m }{%
    \ClassWarning{\classname}{\string\blankpagestyle\space is
    obsolete,\MessageBreak use \string\setblankpagestyle \space  instead}\DeclareDocumentCommand{\blank@p@gestyle}{}{#1}
}
\NewDocumentCommand{\setblankpagestyle}{ m }{\DeclareDocumentCommand{\blank@p@gestyle}{}{#1}}

\DeclareDocumentCommand\cleardoublepage{}{\clearpage\if@twoside \ifodd\c@page\else
    \hbox{}
    \thispagestyle{\blank@p@gestyle}
    \newpage
    \if@twocolumn\hbox{}\newpage\fi\fi\fi%
}

Best Answer

With a layer pagestyle defined by scrlayer-scrpage the fontsize of the page header can be changed using \addtokomafont{pagehead}{...} or \setkomafont{pagehead}{...}.

Example with the standard book class (because there is no MWE in the question):

\documentclass{book}
\usepackage[markcase=used]{scrlayer-scrpage}
\providepairofpagestyles{thesisSimple}{%
    \clearpairofpagestyles%
    \automark[chapter]{chapter}
    \ihead{\headmark}% Inner header
    \ohead[\pagemark]{\pagemark}% Outer header
}
\ifoot{}% Inner footer
\ofoot{}% Outer footer
\pagestyle{thesisSimple}
\providepairofpagestyles[thesisSimple]{thesis}{%
    \automark*[section]{}%
}
\providepairofpagestyles[thesisSimple]{review}{%
    \ofoot[\shorttitle/\authorname]{\shorttitle/\authorname}
    \ifoot[\today]{\today}
}
\pagestyle{thesis}

\addtokomafont{pagehead}{\Large}% <- change the fontsize of header entries
\usepackage{blindtext}
\begin{document}
\Blinddocument
\end{document}

Related Solutions

[Tex/LaTex] Subsection size in header doesn’t change header height

The Berlin theme uses internally the miniframes outer theme; this outer theme explicitly sets the height of the color box used for the subsection in head/foot as 2.5ex, and its depth as 1.125ex. A change in the size font for the subsections won't therefore increase the height and depth of this box and will produce the undesired effect you noticed.

To change this behaviour, one can make the height and depth of this box font size-aware, by setting their values according to the height and depth of some appropriate characters with the desired font size, as I did in my example code below.

Notice also that I changed the order of \usetheme and \setbeamerfont so you don't have to declare the font size inside \subsection:

\documentclass[compress]{beamer}
\usetheme[]{Berlin} 
\setbeamerfont*{section in head/foot}{size=\huge}
\setbeamerfont*{subsection in head/foot}{size=\huge}

\newlength\SubHt
\settoheight\SubHt{\usebeamerfont{subsection in head/foot}S}
\newlength\SubDh
\settodepth\SubDh{\usebeamerfont{subsection in head/foot}g}

\makeatletter
\setbeamertemplate{headline}
{%
  \begin{beamercolorbox}[colsep=1.5pt]{upper separation line head}
  \end{beamercolorbox}
  \begin{beamercolorbox}{section in head/foot}
    \vskip2pt\insertnavigation{\paperwidth}\vskip2pt
  \end{beamercolorbox}%
  \ifbeamer@theme@subsection%
    \begin{beamercolorbox}[colsep=1.5pt]{middle separation line head}
    \end{beamercolorbox}
    \begin{beamercolorbox}[ht=1.5\SubHt,dp=1.5\SubDh,%defaults: ht=2.5ex,  dp=1.125ex
      leftskip=.3cm,rightskip=.3cm plus1fil]{subsection in head/foot}
      \usebeamerfont{subsection in head/foot}\insertsubsectionhead
    \end{beamercolorbox}%
  \fi%
  \begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
  \end{beamercolorbox}
}
\makeatother

\begin{document}
    \section{Section 1}\subsection{Subsection g1}
    \begin{frame}{Frame}
        Content    
    \end{frame}
\end{document}

enter image description here

[Tex/LaTex] How to change the font of header

You have two main options. Starting with the simpler one:

Use the \chapter[short title]{long title} device.

E.g., in your case, you might write
```
\chapter[Cauchy's Integral Formula]{Cauchy's Integral Formula and Consequences}
```
I've noticed that you've commented that you would prefer not use use this device and, instead, to reduce the running header's font size. Nevertheless, I think you should give it some serious thought. Especially if you have very long chapter titles, if you don't use the short-title device you may need to reduce the font size so drastically (in order to make the title fit in the running header) that the material will become undecipherable -- unless you provide magnifying glasses with each book you sell.
Load a package that makes it straightforward to customize the headers and footers; among these packages are fancyhdr, titleps and scrlayer-scrpage. For instance, if you were to work with the fancyhdr package, you might write
```
\usepackage{fancyhdr}
\fancyhead{}
\fancyfoot{}
\renewcommand{\headrulewidth}{0pt}
\fancyhead[RO,LE]{\footnotesize\thepage}
\fancyhead[RE]{\footnotesize\slshape\leftmark}
\pagestyle{fancy}
```
Why \footnotesize? Assuming "Cauchy's Integral Formula and Consequences" is a representative-length chapter name, and assuming you're using standard page block parameters, using \small wouldn't be enough to fit the whole string comfortably on one line.

Best Answer

Related Solutions

[Tex/LaTex] Subsection size in header doesn’t change header height

[Tex/LaTex] How to change the font of header

Related Question