The amount of vertical space added between lines of type -- i e space added to the type body height between lines This occurs automatically in most desktop software applications, but can be adjusted in some Leading is NOT the distance between baselines, although Adobe Photoshop (see note below) uses leading this way In "negative leading", the leading is less than the body size
The measurement of the space occupied by a line of text from one baseline to the next This takes into consideration the size of the text and the space between lines of text