4.3 Set your theme - grey vs white

If you find yourself always adding the same theme to your plot (i.e. we really like the + theme_bw()), you can use theme_set() so your chosen theme is applied to every plot you draw:

In fact, we usually have these two lines at the top of every script:

Furthermore, we can customise anything that appears in a ggplot() from axis fonts to the exact grid lines, and much more. That’s what Chapter 5: Fine tuning plots is all about, but in here we are focussing on the basic functionality and how different geoms work. But from now on,+ theme_bw() is automatically applied on everything we make.