User Guide

FontLab 4
656
Compiling the Classes
There are two set of classes: text-based class definitions made in the
feature-definition language and located in the bottom field of the
OpenType panel, and FontLab glyph classes that are represented in the
Classes panel (for more information about the Classes panel please refer to
page 429).
It is natural to provide a link between these classes. Use the following
option in the Tools > Options > OpenType dialog box:
to automatically include all FontLab classes into the compiled
feature-definition code.
Please note that FontLab will import all OpenType classes when an
OpenType font is imported and will place them in the OpenType panel and
FontLab Classes panel, so when you use this option for an imported font
you need to manually delete the OpenType classes to avoid duplication.