An example on how to use the ggtext package

ggtext_example.R

library(palmerpenguins)
library(tidyverse)
library(ggtext)
library(magick)
library(grid)

logo_pp <- image_read("../pp_logo.png")
logo_gg <- image_read("../ggtext.png")
#imgurl <- system.file("../ggtext.png", package="hexSticker")
# sticker(logo_gg, package="hexSticker", p_size=20, s_x=1, s_y=.75, s_width=.6,
#         filename="../imgfile.png")

p <-
  penguins %>%
  filter_all(~ !is.na(.)) %>%
  ggplot(aes(bill_depth_mm, bill_length_mm)) +
  geom_point(aes(color = species), alpha = 0.8, size = 3) +
  scale_color_manual(
    name = NULL,
    values = c(Adelie = "#6495ED", Gentoo = "#6E8B3D", Chinstrap = "#FF7F00"),
    labels = c(
      Adelie = "<i style='color:#6495ED'>Adelie</i>",
      Gentoo = "<i style='color:#6E8B3D'>Gentoo</i>",
      Chinstrap = "<i style='color:#FF7F00'>Chinstrap</i>"
    )
  ) +
  theme_afs() + # can use theme_minimal()
  theme(
    legend.position = "none",
    axis.title.y = element_text(margin = margin(t = 0, r = 10, b = 0, l = 0)),
    plot.title = element_markdown(lineheight = 1.1),
    legend.text = element_markdown(size = 11)
  ) +
  labs(
    y = "Bill length",
    x = "Bill depth",
    title = "**This is an example of the *ggtext* package**<br>
    <span style='font-size:12pt'>Here we are using it to change the color of the subtitle in order to remove<br>
    the legend and have more screen real estate:
    <span style='color:#6495ED;'>Adelie</span>,
    <span style='color:#6E8B3D;'>Gentoo</span>, and
    <span style='color:#FF7F00;'>Chinstrap</span> penguins</span>",
    caption = "Source:\nhttps://allisonhorst.github.io/palmerpenguins/\nhttps://wilkelab.org/ggtext/index.html"
  )

p
grid.raster(
  logo_pp,
  x = 0.02,
  y = 0.01,
  just = c("left", "bottom"),
  width = unit(0.75, "inches")
)
grid.raster(
  logo_gg,
  x = 0.12,
  y = 0.01,
  just = c("left", "bottom"),
  width = unit(0.75, "inches")
)