Leading
N.M
N.F

In typography, line spacing refers to the vertical space between two lines of text. It plays an essential role in the readability and aesthetics of a layout. Too tight spacing makes reading tiring, while spacing that is too wide breaks the continuity of the text.

Use case: In an institutional brochure, a line spacing of 1.5 is chosen to make the text airy and pleasant to read, unlike a simple spacing considered too dense.