User Guide

FontLab 4
440
Class-Based Kerning and OpenType Fonts
By default, FontLab will keep a class-based kerning structure when you
open an OpenType font that has it. For each kerning class FontLab will
automatically generate a class name and mark the first glyph in the class as
the key glyph. This feature allows you to work with the huge kerning tables
of some OpenType fonts in a comfortable environment that excludes most
repetitive pairs.
When you finish edit kerning pair values in the Metrics window you need
to create a “kern” feature that will build kerning into the final OpenType
font. You can use the special macro program available in the Macros
submenu of the Metrics window context menu or you can simply remove
the kern feature and FontLab will automatically generate a new one on
export of the OpenType font.