[[Text MOC]] https://www.smashingmagazine.com/2014/09/balancing-line-length-font-size-responsive-web-design/ [[people read by scanning horizontally and vertically]]. If line height is too tight, it undermines horizontal scanning. If line height is too loose, vertical scanning is harder. > a good rule of thumb is to set line height at approximately **150% of the font size.** Smaller type needs larger line heights to be read comfortably. The space above the text also helps you see the shapes of words. For small displays with short line length, like a phone screen, tighter line height under 150% is more readable.