This theme is designed to be a foundation from which to build new
themes, and not meant to be used directly.
is a complete theme with only minimal number of elements defined.
It is easier to create new themes by extending this one rather
theme_bw, because those themes
those themes define elements deep in the hierarchy.
theme_foundation(base_size = 12, base_family = "")
base font size
base font family
This theme takes
theme_gray and sets all
NULL, except for the top-level elements
title), which have
colour = "black",
fill = "white". This leaves the spacing
and-non colour defaults of the default
ggplot2 themes in place.