--- a/slides.sty	Sun Aug 05 21:52:40 2018 +0100
+++ b/slides.sty	Sun Sep 23 09:02:52 2018 +0100
@@ -2,6 +2,7 @@
 \usepackage{xcolor}
 \usepackage{fontspec}
 \usepackage[sc]{mathpazo}
+%%\usepackage{CronosPro}
 \usefonttheme{serif}
 \defaultfontfeatures{Ligatures=TeX}
 \defaultfontfeatures{Mapping=tex-text}