On Wed, 17 Jun 2020, Giovanni wrote:
It should go in Class Options -> Custom Without quote, btw. In the source view it should be like this: \documentclass[italian,aspectratio=169]{beamer}
Giovanni, I must have mis-typed something the first time I tried it as a class option (of course no quotes) because this time it worked. I searched the Beamer manual (in LyX) for 'aspectratio' and it found nothing. Thanks for your help. Regards, Rich -- lyx-users mailing list lyx-users@lists.lyx.org http://lists.lyx.org/mailman/listinfo/lyx-users