Annotate the whole layout
Examples
p1 <- ggplot(mtcars) +
geom_point(aes(mpg, disp))
p2 <- ggplot(mtcars) +
geom_boxplot(aes(gear, disp, group = gear))
p3 <- ggplot(mtcars) +
geom_bar(aes(gear)) +
facet_wrap(~cyl)
align_plots(p1, p2, p3) +
layout_title(title = "I'm title")