# [Tex/LaTex] LaTeX beamer presentation-package 16:9 aspect ratio

beamerpaper-size

I'm programming a presentation in LaTeX using the beamer class.

However, it defaults to 4:3 aspect ratio slides, while everything I use is 16:9. Is there an easy way to change this using a command or two?

It looks like the current version of beamer supports aspectratio option.
\documentclass[aspectratio=169]{beamer}

edited to add: As of the 2022 (so TeXLive users will need to have TeXLive 2022), arbitrary aspect ratios are available. Two-digit numbers after aspectratio= will be interpreted as X:Y, three-digit numbers as XX:Y and four digit as XX:YY.