Adobe 65009333 User Guide - Page 197
Types of kerning, How kerning and tracking are measured, are: LA, P., To, Tr, Ta, Tu, Te, Ty, Wa, We
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USING INCOPY CS4 191 Typography Types of kerning You can automatically kern type using metrics kerning or optical kerning. Metrics kerning uses kern pairs, which are included with most fonts. Kern pairs contain information about the spacing of specific pairs of letters. Some of these are: LA, P., To, Tr, Ta, Tu, Te, Ty, Wa, WA, We, Wo, Ya, and Yo. InCopy uses metrics kerning by default so that specific pairs are automatically kerned when you import or type text. To disable metrics kerning, select "0". Optical kerning adjusts the spacing between adjacent characters based on their shapes. Some fonts include robust kern-pair specifications. However, when a font includes only minimal built-in kerning or none at all, or if you use two different typefaces or sizes in one or more words on a line, you may want to use the optical kerning option. Before applying the optical kerning option to the "W" and "a" pair (top), and after (bottom) You can also use manual kerning, which is ideal for adjusting the space between two letters. Tracking and manual kerning are cumulative, so you can first adjust individual pairs of letters, and then tighten or loosen a block of text without affecting the relative kerning of the letter pairs. Word kerning isn't the same as the Word Spacing option in the Justification dialog box; word kerning changes the kerning value only between a specific word's first character and the word space preceding that character. A B C Kerning and tracking A. Original B. Kerning applied between "W" and "a" C. Tracking applied How kerning and tracking are measured You can apply kerning, tracking, or both to selected text. Tracking and kerning are both measured in 1/1000 em, a unit of measure that is relative to the current type size. In a 6-point font, 1 em equals 6 points; in a 10-point font, 1 em equals 10 points. Kerning and tracking are strictly proportional to the current type size. Tracking and manual kerning are cumulative, so you can first adjust individual pairs of letters, and then tighten or loosen a block of text without affecting the relative kerning of the letter pairs. When you click to place the insertion point between two letters, InCopy displays kerning values in the Character panel and the Control panel. Metrics and optical kerning values (or defined kern pairs) appear in parentheses. Similarly, if you select a word or a range of text, InCopy displays the tracking values in the Character panel and Control panel. Updated 29 April 2009