exemple

source/exemple.tex

 % vim: expandtab tabstop=2 softtabstop=2 shiftwidth=2
+\pdfminorversion=4
+%\pdfpageattr {/Group << /S /Transparency /I true /CS /DeviceRGB>>}
 \documentclass[aspectratio=169]{beamer}
 \usepackage[utf8]{inputenc}
 \usepackage[frenchb,noconfigs]{babel}
 
-\usepackage[]{beamerx}
+\usepackage{beamerx}
 \usepackage{lipsum}
 
 \title[Stage de seconde année à l'École polytechnique]
@@ -79,6 +81,7 @@
     \begin{column}{0.25\textwidth}
       \begin{block}{Groups}
         While not well known, the collective nouns used for cats and kittens are a clowder of cats and a kindle of kittens.
+        \vspace*{5ex}
       \end{block}
     \end{column}
     \begin{column}{0.5\textwidth-1ex}
@@ -119,6 +122,7 @@
     \begin{column}{0.25\textwidth}
       \begin{block}{Groups}
         While not well known, the collective nouns used for cats and kittens are a clowder of cats and a kindle of kittens.
+        \vspace*{5ex}
       \end{block}
     \end{column}
     \begin{column}{0.5\textwidth-1ex}