Just a quick query about the revealjs options one can use to create slides. I love a lot of its features but I'm unable to figure out if I can change the font size of text globally. The small html tag makes it possible to make certain sections smaller, but I'd like to know if there's an option to specify something perhaps in the YAML header for the whole slide deck. I believe CSS might be my answer but I'm genuinely confused at the various options in CSS to change font size.
Any help hugely appreciated.