User Guide

Making OpenType Fonts
645
lookupflag format B:
lookupflag <number>;
Here the entire lookup flag value is specified simply as a <number>. The
format A example above could equivalently be expressed as:
lookupflag 6;
Format A is clearly a superior choice for human readability when the
lookupflag value is not 0. However, a lookupflag value of 0 can be set only
with format B, not with format A:
lookupflag 0;
The base glyphs, ligatures, and marks are defined in the Glyph Properties
dialog. This information is stored in the OpenType font file in the GDEF
table. Please, be sure to allow export of this table in the Options >
OpenType if you are using the lookupflag feature in the feature-definition
file: