groff: Sizes
5.18 Sizes
==========
'gtroff' uses two dimensions with each line of text, type size and
vertical spacing. The "type size" is approximately the height of the
tallest glyph.(1) (⇒Sizes-Footnote-1) "Vertical spacing" is the
amount of space 'gtroff' allows for a line of text; normally, this is
about 20% larger than the current type size. Ratios smaller than this
can result in hard-to-read text; larger than this, it spreads the text
out more vertically (useful for term papers). By default, 'gtroff' uses
10 point type on 12 point spacing.
The difference between type size and vertical spacing is known, by
typesetters, as "leading" (this is pronounced 'ledding').
Menu