Leading refers to the horizontal space between lines of type—in your previous, non-designer lives you might have referred to this as line spacing. Many digital designers will use the term line height, seeing that this is the term used when coding in languages like html. For body copy, a comfortable amount of leading is usually 2–3pt sizes larger than the character size in use. When using all caps, leading sizes around the same as the type size—and sometimes even less than the type size—can work well as there are no ascenders or descenders at risk of clashing.