How to change default ggplot2 settings to improve readability of the plot?

To change the default ggplot2 settings and improve the readability of the plot, you can use the theme() function to modify various elements such as the font size, font family, axis text, legend text, and background color. Here are some common modifications you can make:

• Increase the font size: theme(text = element_text(size = 14))
• Change the font family: theme(text = element_text(family = "Arial"))
• Change the axis text color: theme(axis.text = element_text(color = "black"))
• Change the legend text color: theme(legend.text = element_text(color = "black"))
• Change the background color: theme(panel.background = element_rect(fill = "white"))
• Remove the grid lines: theme(panel.grid = element_blank())
• Increase the size of the legend text: theme(legend.text = element_text(size = 12))
• Increase the size of the axis labels: theme(axis.title = element_text(size = 14))

You can modify any number of elements using the theme() function. Just make sure to add it at the end of your ggplot code, like here:

ggplot(data, aes(x, y)) + geom_point() + theme(...).