Merging Legends in ggplot2: A Single Legend for Multiple Scales

Understanding Animations in gganimate: A Deep Dive into Axis Labels and Tick Marks for Visualizing Data Interactively with Ease

Removing Black Lines from Fill Scale Legend using `geom_vline` and `geom_histogram` in R with ggplot2

10 Ways to Reorder Items in a ggplot2 Legend for Effective Visualizations

Customizing Legends for Points and Lines in ggplot2: A Step-by-Step Guide