--- a/slides.sty	Wed Nov 04 15:35:31 2020 +0000
+++ b/slides.sty	Fri Nov 06 01:07:26 2020 +0000
@@ -24,6 +24,8 @@
 \defaultfontfeatures{Ligatures=TeX}
 \defaultfontfeatures{Mapping=tex-text}
 
+%% for recording slides
+\setbeamersize{text margin right=5cm} % <- like this
 
 %%%% Colours
 
@@ -82,7 +84,10 @@
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-\beamertemplateballitem
+%%\beamertemplateballitem
+\setbeamertemplate{itemize item}[ball]
+\setbeamertemplate{itemize subitem}[ball]
+\setbeamertemplate{itemize subsubitem}[ball]
 \setlength\leftmargini{2mm}
 \setlength\leftmarginii{0.6cm}
 \setlength\leftmarginiii{1.5cm}