beamerpresentationsthemes
I'm looking for a Beamer theme which mimics the look of the default reveal.js theme. Slides created with reveal.js can look like this:
(A complete demo you can find here.) I am just curious whether there exists some ready-made Beamer theme achieving this bold large-letter look.
PS: A google search brought up that there are vice versa some reveal.js themes mimicking various Beamer themes, but not the other way round – and that's what I'm looking for!
Simply copy the definition of the footline template and introduce the desired modifications:
\documentclass{beamer}
\makeatletter
\DeclareOptionBeamer{compress}{\beamer@compresstrue}
\ProcessOptionsBeamer
\mode<presentation>
\useoutertheme[footline=authortitle]{miniframes}
\useinnertheme{circles}
\usecolortheme{whale}
\usecolortheme{orchid}
% Colors.
\definecolor{beamer@blendedblue}{rgb}{0.137,0.466,0.741}
\setbeamercolor{structure}{fg=beamer@blendedblue}
\setbeamercolor{titlelike}{parent=structure}
\setbeamercolor{frametitle}{fg=black}
\setbeamercolor{title}{fg=black} \setbeamercolor{item}{fg=black}
% The footline template is a modification of the one used in the
% Torino theme, Copyright 2007 by Marco Barisione
\setbeamercolor*{lineup}{parent=palette primary}
\setbeamercolor*{linemid}{parent=palette secondary}
\setbeamercolor*{linebottom}{parent=palette tertiary}
\setbeamercolor*{page header}{parent=titlelike}
\mode <all>
% some lengths (the height of the lines)
\newlength{\beamer@decolines@linemid}
\setlength{\beamer@decolines@linemid}{.015\paperheight}
\newlength{\beamer@decolines@lineup}
\setlength{\beamer@decolines@lineup}{.025\paperheight}
\newlength{\beamer@decolines@linebottom}
\setlength{\beamer@decolines@linebottom}{.01\paperheight}
% String used between the current page and the total page count.
\def\beamer@decolines@pageofpages{/}
\defbeamertemplate*{footline}{decolines theme}
{
\leavevmode%
% First line.
\hbox{%
\begin{beamercolorbox}[wd=.8\paperwidth,ht=\beamer@decolines@lineup,dp=0pt]{lineup}%
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.2\paperwidth,ht=\beamer@decolines@lineup,dp=0pt,right]{}%
\hbox{\usebeamerfont{palette primary}\footnotesize\insertframenumber{} \beamer@decolines@pageofpages{} \inserttotalframenumber\hspace*{2ex}}%
\end{beamercolorbox}%
} %
% Second line.
\hbox{%
\begin{beamercolorbox}[wd=\paperwidth,ht=\beamer@decolines@linemid,dp=0pt]{linemid}%
\end{beamercolorbox}%
} %
% Third line.
\hbox{%
\begin{beamercolorbox}[wd=.9\paperwidth,ht=\beamer@decolines@linebottom,dp=0pt]{linebottom}%
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.1\paperwidth,ht=\beamer@decolines@linebottom,dp=0pt]{}%
\end{beamercolorbox}%
}%
}
\makeatother
\setbeamertemplate{navigation symbols}{}
\begin{document}
\begin{frame}
\frametitle{Task}
Task.
\end{frame}
\end{document}
When you need this level of customization, it is unlikely that you find themes which suit perfectly all you need, and it is time for you to do the "dirty work" yourself.
Adding a background image to a beamer presentation is possible using the background canvas template.
A very basic MWE (I didn't change the color of anything to make the text readable, nor did I try to tweak the alignment).
\documentclass{beamer}
\usetheme{AnnArbor}
\setbeamertemplate{background canvas}{\includegraphics[scale=1]{HetqF}}
\title{Title}
\begin{document}
\maketitle
\begin{frame}
\frametitle{And a frame}
With some text
\end{frame}
\end{document}
The images you provided don't make a good fit for a background, they don't have a high-enough resolution, and they are too colorful for the text to be readable. But that's no longer a latex problem.
Edit: As mentioned by Mark Wibrow in a comment, the readability issue can be tackled with Latex features, using tikz to change the opacity of the included picture.
His code snippet also shows how one can change the placement of the picture, by aligning it to the right.
\usepackage{tikz}
\setbeamertemplate{background canvas}{\vbox to\paperheight{\vfil\hbox to\paperwidth{\hfil\tikz\node[opacity=0.15]{\includegraphics[scale=1]{HetqF}};}\vfil}}
% 0.0625 wasn't enough for the picture to be easily visible on my screen
If you want to have a different image on each slide, you have a few solutions.
The first one is to manually define the background at each slide (thanks to Mark Wibrow for this solution).
For this, you put in the preamble:
\newenvironment{background}[1]{\setbeamertemplate{background canvas}{\includegraphics{#1}}}{}
and you call it using
\begin{background}{image1}
\begin{frame}
...
\end{frame}
\end{background}
Another option, if you want to cycle amongst a few images only, is to use the beamer template system. That is, you define different templates for the background in the preamble:
\defbeamertemplate{background canvas}{background1}{\includegraphics{image1}}
\defbeamertemplate{background canvas}{background1}{\includegraphics{image1}}
and then you can use them in the document
\setbeamertemplate{backgroundcanvas}[background1] % Square brackets, not braces
\begin{frame}
...
\end{frame}
Best Answer
From a Commentary on the German TeXWelt I got the following hint:
The beamer theme Focus (see GitHub - elauksap/focus-beamertheme: Focus: a minimalist presentation theme for LaTeX Beamer.) is a good starting point.