Character spacing in math mode in metropolis theme

beamerbeamer-metropolismath-modespacing

I'm having trouble with the way the characters are spaced in the Metropolis Beamer theme, while using the serif font for math mode. Here's a MWE:

\documentclass[10pt]{beamer}


\usetheme[progressbar = frametitle,
block = fill,
background = light
]{metropolis}



\usepackage{appendixnumberbeamer}

\usepackage{booktabs}
\usepackage[scale=2]{ccicons}

\usepackage{pgfplots}
\usepgfplotslibrary{dateplot}

\usepackage{xspace}
\newcommand{\themename}{\textbf{\textsc{metropolis}}\xspace}


\usepackage{xcolor}
\usepackage{amsmath}
\usepackage{mathtools}
\usepackage{tikz-cd}
\usepackage{tikz}
\usepackage{bm}
\usepackage{mathbbol}
\usepackage{caption}
\usepackage{bbm}
\usepackage{graphicx}
\usepackage{scalerel}
\usepackage{accents}
\usepackage{soul}
\usepackage{mathtools}
\usepackage{dirtytalk}
\usepackage{shuffle}
\usepackage{tensor}
\DeclareSymbolFontAlphabet{\mathbb}{AMSb}
\DeclareSymbolFontAlphabet{\mathbbl}{bbold}
\usepackage[utf8]{inputenc}
\usefonttheme[onlymath]{serif}

\begin{document}
    \begin{frame}
        \[
        \mathbb E[Y]
        \]
    \end{frame}
\end{document}

I've compiled this with XeTeX, MacTeX distribution (I had to install the fira sans font system-wide to get the theme to work). As you can see, the character spacing is way off:
This seems to happen with some characters and not others, but is pervasive throughout the document, and looks quite bad.

I would be grateful for any advice for how to fix this without changing the theme or font. Perhaps there is some way of requiring the math font switch within the .sty file, in a way that results in the spacing being correct. Thank you.

Best Answer

If I ask for \showoutput, I get

......\hbox(7.5+2.5)x19.65225, shifted 143.81882, display
.......\U/msb/m/n/10 E
.......\OT1/cmr/m/n/10 [
.......\TU/lmr/m/it/10 glyph#117
.......\OT1/cmr/m/n/10 ]

and this is the cause: there is no kerning between characters in different fonts. With your setup.

If I also load \usefonttheme{professionalfonts}, the tracing becomes

......\hbox(7.5+2.5)x20.25005, shifted 143.51991, display
.......\U/msb/m/n/10 E
.......\OT1/cmr/m/n/10 [
.......\OML/cmm/m/it/10 Y
.......\kern2.22223
.......\OT1/cmr/m/n/10 ]

and the kern is present.

Related Solutions

[Tex/LaTex] LaTeX beamer: pagenumbering appendix

I think, your footline disappeared, because it was overwritten with \setbeamertemplate{footline}[page number]

\documentclass{beamer}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\setcounter{subsection}{1}

\usetheme{Berkeley}
\usecolortheme{seahorse}
\usefonttheme{serif}
\useinnertheme{rounded}

%%Make desired footline
\makeatletter
\setbeamertemplate{footline}
{
  \leavevmode%
  \hbox{%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
    \usebeamerfont{author in head/foot}\insertshortauthor~~\beamer@ifempty{\insertshortinstitute}{}{(\insertshortinstitute)}
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{subtitle in head/foot}%
    \usebeamerfont{title in head/foot}\insertsubtitle
  \end{beamercolorbox}%
  \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
    \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
    \insertframenumber/\inserttotalframenumber\hspace*{2ex} 
  \end{beamercolorbox}}%
  \vskip0pt%
}

\defbeamertemplate{footline}{page number appendix}
{
    \leavevmode%
    \hbox{%
        \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
            \usebeamerfont{author in head/foot}\insertshortauthor~~\beamer@ifempty{\insertshortinstitute}{}{(\insertshortinstitute)}
        \end{beamercolorbox}%
        \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,center]{subtitle in head/foot}%
            \usebeamerfont{title in head/foot}\insertsubtitle
        \end{beamercolorbox}%
        \begin{beamercolorbox}[wd=.333333\paperwidth,ht=2.25ex,dp=1ex,right]{date in head/foot}%
            \usebeamerfont{date in head/foot}\insertshortdate{}\hspace*{2em}
             \Roman{framenumber}\hspace*{2ex} 
        \end{beamercolorbox}}%
        \vskip0pt%
    }

\g@addto@macro\appendix{%
    \setbeamertemplate{footline}[page number appendix]%
}

\makeatother

\usepackage{appendixnumberbeamer}

%%No Navigation template
\beamertemplatenavigationsymbolsempty

%%Title
\title{My beamer slides}
\author{Just another guy}
\institute[ABC]{My famous ABC institute}
\date{worldwide, \today}

%\logo{\includegraphics[width=1.5cm]{./logo}}

\begin{document}

\section{First Section}
\begin{frame}{First slide}
First slide (1/2)
\end{frame}

\begin{frame}{Second slide}
Second slide (2/2)
\end{frame}


\appendix

\section{Appendix}
\begin{frame}
First appednix (I)
\end{frame}

\begin{frame}
    First appednix (II)
\end{frame}

\end{document}

[Tex/LaTex] Adding section indicator to Metropolis theme

The first example you linked to, uses a modified version of the Berlin theme, which in return uses the headline from the miniframe theme. You can simply keep using the metropolis theme and add this headline.

What is left for you to do, is to decide which colours you want to have - just modify \setbeamercolor{section in head/foot}{fg=normal text.bg, bg=structure.fg}

\documentclass{beamer}

\usetheme{metropolis}

\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}%
  \begin{beamercolorbox}[colsep=1.5pt]{lower separation line head}
  \end{beamercolorbox}
}
\makeatother

\setbeamercolor{section in head/foot}{fg=normal text.bg, bg=structure.fg}

\begin{document}

\section{section 1}
\subsection{section name}
\begin{frame}
\frametitle{blub}
    abc
\end{frame} 
\begin{frame}
\frametitle{blub}
    abc
\end{frame} 

\section{section 2}
\begin{frame}
\frametitle{blub}
    abc
\end{frame} 

\section{section 3}
\begin{frame}
\frametitle{blub}
    abc
\end{frame}     

\end{document}

[In case you prefer the navigation bar from the second template you linked to, you can have a look into beamerouterthemesplit.sty and take the headline from there - but personally I don't think this will look good with metropolis, as the dark frametitle is already a quite dominant element and does not need the large headline from the split theme.]

Best Answer

Related Solutions

[Tex/LaTex] LaTeX beamer: pagenumbering appendix

[Tex/LaTex] Adding section indicator to Metropolis theme

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