increase legend font size ggplot2

Question

Is there a way to increase the font size in ggplot2? I think I need to specify something like legend.key.width = unit(2, "line") in the theme function, but that is used to adjust the keys in legends, not the font sizes. Thanks!

Answer 1

To increase the legend font size in ggplot2, you can add the following to your plot: 

 theme(legend.text=element_text(size=X))

Where

X is the size.

For example:

ggplot(data = iris,

       aes(x = Sepal.Length, y = Sepal.Width,col = Species, label = Species)) + 

  geom_point() +

   theme(legend.text=element_text(size=15))

Output: