Change the size of the (sub)titles in PlotLayout

Hi @aho

I'm using PlotLayout for 4 different plots, 2 in the first row, 2 in the bottom. I have different titles for each of them, so I wanted to use the titles = c(title1, title2, title3, title4) argument.

But then I can't change the size of the police. The subtitle_scale argument works row_titles and col_titles. Is that possible to add this option of titles as well?

Thanks

Aude