As someone who often gives talks abroad, I usually do not know beforehand which resolutions the projector supports. Thus, I always create both a 4:3 and a 16:9 version of my slides, using e.g.
\documentclass[aspectratio=169]{beamer}
Is there a way to create both without having to change this line? I use pdflatex.
pandoc -t latex -V aspectratio=169
and oncepandoc -t latex -V aspectratio=43
but that's just me I gues... – mb21 Aug 11 '16 at 16:15