\documentclass[aspectratio=43]{beamer}\usetheme{Berkeley}
\usecolortheme{seahorse}\usebackgroundtemplate
{\includegraphics[width=\paperwidth]{paper.png}}
\setbeamercovered{transparent}
\beamertemplatenavigationsymbolsempty
\addtobeamertemplate{navigation symbols}{}{
\color{black}\normalsize\textbf\insertframenumber}
\newcommand{\img}[2]{\includegraphics[#1]{images/#2}}
\newcommand{\imgbig}[1]{\img{width=.86\textwidth}{#1}}
\newcommand{\imgico}[2]{\img{height=#1em}{#2}}
% éléments de la page de titre
\def\hi{Mieux produire des documents}
\def\lo{concepts et outils}\def\bititle{\hi, \lo}
\logo{\includegraphics[height=7.6em]{../cnam.png}}
\title[\hi]{\hi}\subtitle{\lo}
\author[M. Beninca]{Marc Beninca}
\institute[CNAM]{Conservatoire National des Arts et Métiers}
\date[Blanc 2020]{Oral probatoire blanc\\Mardi 12 Mai 2020}
% liens, polices, logos, colonnes, listings
\hypersetup{colorlinks,linkcolor=blue,urlcolor=blue}
\usepackage{fontspec}\usepackage{metalogo}
\setmainfont{DejaVu Sans}\setmonofont{DejaVu Sans Mono}
\usepackage{multicol}\usepackage{listings}
