Amount of space between lines of type.<br><br>In typography, the horizontal spaces between lines of type, its thickness (height on a page) measured in points. Desk-top publishing software application programs employ this term (including Adobe FrameMaker, Adobe PageMaker, QuarkXpress, and Ventura Publisher), although some have incorrectly used it to mean the combined height of the leading plus an adjacent line of type. (If font is 12 points and leading is 2 points, for example, such programs mistakenly say you&#39;re using 14 points of leading). The term originated with the actual lead strips used with hand- and mechanically-aligned type. The space between characters side-to-side horizontally is called letter space.(pr. LED-&#601;ng)