• virtual ‘size’ of figure
• size of figure in text
• aspect ratio (height/width)

• “Save” button in RStudio
• pdf(); ...; dev.off() (or the same for png(), etc.)
• ggsave() [automatically saves most recent ggplot, but can specify a gg* object]

• dimension arguments width, height in pdf(), png(), etc. (different units!)
  • but always inches in pdf, which is generally the best choice
• width, height in ggsave (always inches for any format)
• can also control text, etc. sizes with e.g. cex (base R) or theme_*(base_size = ...) (ggplot2)
• chunk options: fig.width, fig.height (Rmarkdown), fig-width, fig-height (quarto) (can set these to a default spec in a document, in YAML header or via knitr::opts_chunk())
• decreasing the physical size of a figure increases the relative size of text, lines, etc.
• your axis labels are probably too small

• size on the page
• out.height/out.width (Rmarkdown), out-height/out-width (Quarto): output-format dependent

Height of the plot in the output document, which can be different from its physical fig-height, i.e., plots can be scaled in the output document. Depending on the output format, this option can take special values. For example, for LaTeX [PDF] output, it can be 3in, or 8cm; for HTML, it can be 300px [OR “50%”]

• Generally better to scale both dimensions the same; this will likely just work if you specify only width or height, but you should check

• trial and error
• fancy stuff
  • https://cran.r-project.org/web/packages/r2resize/vignettes/introduction_r2resize.html
  • https://rpubs.com/oobianom/add-resize-images-tables-in-rmarkdown-quarto-r
  • https://github.com/EmilHvitfeldt/quarto-revealjs-editable