Multi line title in ggplot 2 with multiple italicized words

Question

I am trying to create a plot title manually formatted on two lines which includes two italicized words, I have done some s

Answer 1

Using a combination of atop, paste, italic and scriptstyle:

ggplot(mtcars, aes(x = wt, y = mpg)) +
  geom_point() +
  labs(title = ~ atop(paste('First line of title with ',italic("Species")),
                      paste(scriptstyle(italic("Species")),
                            scriptstyle(" secondline words "),
                            scriptstyle(italic("anotherSpecies")),
                            scriptstyle(" the end"))))

gives you the desired result:

Using scriptstyle is not a necessity, but imho it is nicer to have your subtitle in a smaller font than the main title.

See also ?plotmath for other usefull customizations.