User Guide

FontLab 4
660
Converting the Kerning
If you have defined a kern feature you can convert it into the plain pair
kerning table at any time. Just click on the
button on the OpenType
Features preview panel. You will see a dialog box:
There are two options that you can select in the list:
Completely replace “plain” pair kerning data
Use this option to remove existing kerning information and replace it with
the result of the kern feature interpretation.
Append converted kerning to the existing kerning table
Only new pairs that do not already exist will be added to the existing pair
kerning table.
Notes:
1. This operation is equivalent to the OpenType import option:
The difference is that you can do it at any time not just during import
of the OpenType font file.
2. Class-based kerning, defined in the kern feature, will be converted into
class-based kerning as FontLab understands it. Real kerning pairs will
be added only for the key glyphs. Please, refer to the Editing Metrics
chapter and page 428 for more information about class-based kerning.