Editing Typeface (section)

===Sizing===
The size of typefaces and [[font]]s is traditionally measured in [[Point (typography)|points]];<ref>Graham, Lisa. ''Basics of Design: Layout & Typography for Beginners''. New York: Delmar, 2002: 184. {{ISBN|0-7668-1362-2}}.</ref> ''point'' has been defined differently at different times, but now the most popular is the Desktop Publishing point of {{frac|1|72}}&nbsp;in ({{convert|0.0139|in|mm|abbr=on|disp=or}}). When specified in typographic sizes (points, kyus), the height of an ''em-square'', an invisible box which is typically a bit larger than the distance from the tallest [[Ascender (typography)|ascender]] to the lowest [[descender]], is scaled to equal the specified size.<ref>Apple's [https://developer.apple.com/textfonts/TTRefMan/RM01/Chap1.html#master TrueType Reference Manual] Retrieved on 2009-06-21</ref> For example, when setting [[Helvetica]] at 12 point, the em square defined in the Helvetica font is scaled to 12 points or {{convert|1/6|in|mm|abbr=on|disp=or}}. Yet no particular element of 12-point Helvetica need measure exactly 12 points.

Frequently measurement in non-typographic units (feet, inches, meters) will be of the ''cap-height'', the height of the capital letters. Font size is also commonly measured in millimeters (mm) and ''q''s (a quarter of a millimeter, ''kyu'' in romanized Japanese) and inches.