insert_* with scale_*_discret(limits=""). (2020-07-03, Fri)
ggplot() + theme_void() instead of patchwork::plot_spacer() for empty plot (2020-04-15, Wed)xrange and yrange (2020-04-07, Tue)plot_list (2020-03-31, Tue)ggsave to export the aplot object to a figure (e.g. png, pdf)