This function adds the word draft to certain graphics.
add_draft(
  label = "DRAFT",
  size = 10,
  colour = "grey50",
  x = Inf,
  y = -Inf,
  ...
)draft layer default to DRAFT
size of the annotation
color of the annotation default to grey50
numeric x coordinate of the draft label
numeric y coordinate of the draft label
extra parameters to geom text used to annotate the draft
ggplot2 annotation