In the other hand, if I run the same command on the console, and click the button: "Preview" for the plot generated on the right panel, so the image covers the entire screen, then I can read the text properly.
My question is: is it out there any way to make the generated image on the R markdown to be bigger? There is no problem if when the image gets embedded on the HTML it is small, but at least, I would like that when I drag drop the image out to another tab, I can read the text properly.