Use mtext() to write text in margin – the R Graph Gallery
Laying out multiple plots on a page
r - Common main title of a figure panel compiled with par(mfrow) - Stack Overflow
Base R graphics
Math Notation for R Plot Titles: expression, bquote, & Greek Letters | TRinker's R Blog
Combining plots in R with mfrow, mfcol and layout | R CHARTS
Labelling Panels in R - Strategies for placing letters in figure panels. - seananderson.ca
YaRrr! The Pirate's Guide to R
One Tip Per Day: Two tips: adding title for graph with multiple plots; add significance asterix onto a boxplot
R Essentials
r - Title key on each panel of a plot generated with par(mfrow=c(x,y)) - Stack Overflow
YaRrr! The Pirate's Guide to R
Graphics
Laying out multiple plots on a page
Common Main Title for Multiple Plots in Base R & ggplot2 (Example) | patchwork Package Composition - YouTube
Introduction to R
R Graphics: Multiple Graphs and par(mfrow=(A,B)) - The Analysis Factor
Setting graph margins in R using the par() function and lots of cow milk | R-bloggers
4.4 Multiple graphs | An Introduction to R
r - Titles overlapping or going out - Stack Overflow
4.4 Multiple graphs | An Introduction to R
Two tips: adding title for graph with multiple plots; add significance asterix onto a boxplot | R-bloggers
r - Title key on each panel of a plot generated with par(mfrow=c(x,y)) - Stack Overflow
Add Common Main Title for Multiple Plots in R - GeeksforGeeks
