Customizing a Beamer Theme

Question

I want to produce a beamer presentation exactly as the one attached, it is like the Antibes theme but not exactly. I need to know which theme it is or if is it a customized theme. Antibes theme does not include the Author or the title at the footer, which is exactly what I need to add.

Answer 1

A very quick way to add a footline is using the hackthefootline package:

\documentclass{beamer}

\usetheme{Antibes}

\title{Title}
\author{Author}

\usepackage[twocols]{hackthefootline}

\begin{document}

\section{Section}
\subsection{Subsection}
\begin{frame}
    abc
\end{frame} 
    
\end{document}

Alternatively you could load some other theme for the footline before loading your Antibes theme:

\documentclass{beamer}

\usetheme{Warsaw}
\usetheme{Antibes}

\title{Title}
\author{Author}

\begin{document}

\section{Section}
\subsection{Subsection}
\begin{frame}
    abc
\end{frame} 
    
\end{document}

Answer 2

Beside Sam Carters easy-to-use answers, an additional way, which loads no extra packages or themes, could be to edit the footline using \setbeamertemplate and \usebeamercolor commands:

\usetheme{Antibes}
\author{An Author}
\title{A Long Title}

\setbeamertemplate{navigation symbols}{} % Turns Navigation Symbols off
\setbeamertemplate{footline}{%
\hbox{\begin{beamercolorbox}[ht=1.2em,wd=.5\paperwidth,right,dp=.6em]{palette primary}%
    \insertauthor\hspace*{1em}%
\end{beamercolorbox}%
\begin{beamercolorbox}[ht=1.2em,wd=.5\paperwidth,left,dp=.6em]{title in head/foot}%
    \hspace*{1em}\inserttitle
\end{beamercolorbox}}%
}

\begin{document}

\section{section}
\subsection{subsection}
\begin{frame}
    Some Content
\end{frame}

\end{document}

Edit: As Sam Carter pointed out correctly in the comments, there are different possibilities. The one mentioned above with \beamercolorbox may be the most robust way. Throws no overfull box error anymore and takes care of possible descenders.

Here the other parts I suggested earlier:

One with the \dimexpr version:

{\usebeamercolor[bg]{palette primary}} % Just to make the color available in \colorbox
\setbeamertemplate{navigation symbols}{} % Turns Navigation Symbols off
\setbeamertemplate{footline}{%
\colorbox{black}{%
  \parbox[][1em][c]{\dimexpr.5\paperwidth-2\fboxsep}{\hfill \color{white}\insertauthor\hspace*{1em}}}%
\colorbox{palette primary.bg}{%
  \parbox[][1em][c]{\dimexpr.5\paperwidth-2\fboxsep}{\color{white}\hspace*{1em}\inserttitle\hfill}}%
}

and here my first idea with simple \parbox and \fboxsep:

\setlength\fboxsep{0pt}
{\usebeamercolor[bg]{palette primary}} % Just to make the color available in \colorbox
\setbeamertemplate{navigation symbols}{} % Turns Navigation Symbols off
\setbeamertemplate{footline}{%
\colorbox{black}{%
  \parbox[][1.5em][c]{.5\paperwidth}{\hfill \color{white}\insertauthor\hspace*{1em}}}%
\colorbox{palette primary.bg}{%
  \parbox[][1.5em][c]{.5\paperwidth}{\color{white}\hspace*{1em}\inserttitle\hfill}}%
}