http://la-saponniere.fr/yith-store-locator/?filter_parfums=notes-gourmandes,notes-epicees Auto size of images in Beamer class.

http://lilit-adoption.com/l’intervention-de-madame-francoise-heritier-anthropologue-professeur-honoraire-au-college-de-france-qui-a-ete-projetee-en-ouverture-du-colloque-«-la-liberte-de-nos-origines-»-l/resize.waypoints \usepackage{letltxmacro} \makeatletter \def\maxwidth{\ifdim\Gin@nat@width>\linewidth\linewidth\else\Gin@nat@width\fi} \makeatother \AtBeginDocument{ \LetLtxMacro\Oldincludegraphics\includegraphics \renewcommand{\includegraphics}[2][]{% \Oldincludegraphics[#1,width=\maxwidth]{#2}} }

http://tex.stackexchange.com/questions/67434/redefine-includegraphics-for-beamer#comment143600_67434