Dr. Rapp has put together a most impressive course on ggplot. Each lesson allows one to acquire skills that can't be found in textbooks, or in other YouTube videos.  Tiding a database,  using if_else functions,  mutate(),  calling upon databases within geoms  along with regular expressions is something one rarely finds being treated as a unit as this course does. This course also opened my eyes about the availability of fonts and how to use them effectively.  Replacing ggsave for "camcorder " is a valuable “gem” I plan to use in all my programs.  I have already  alerted my friends and colleagues about this course. On my part, I do plan to enroll in all courses Dr. Rapp offers.