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Flex hints: Nodes 1 and 3 are<br />
on the same level and inside<br />
the alignment zone, node 2<br />
should be exactly on the flat<br />
edge of the zone. The handles<br />
must stay inside the space<br />
defined by nodes 1 through 3.<br />
alignment zone. For best results, the second node (in the<br />
middle) should be exactly on the position (the ‘flat edge’) of<br />
the zone.<br />
1 2 3<br />
baseline<br />
zone<br />
8.3 MANUAL HINTING<br />
Manual and automatic hinting cannot complement each other<br />
inside a single glyph. Any manually hinted glyph is excluded<br />
from the autohinting process. Thus, if you decide to add<br />
hints manually, you must fully hint the glyph. Caution: Hint<br />
replacement is currently not supported, so you must make<br />
sure that there are no overlapping hints. A vertical hint may<br />
overlap a horizontal hint, but a vertical hint cannot overlap<br />
another vertical hint, and a horizontal hint must not interfere<br />
with another horizontal hint.<br />
There are two types of glyph-level hints you can add<br />
manually, stem hints and ghost hints. Stem hints describe a<br />
vertical or a horizontal stem or stem-like feature of a glyph,<br />
like a serif or a crossbar. Ghost hints mark vertical edges when<br />
a horizontal stem hint cannot be applied.<br />
In combination with alignment zones, horizontal hints<br />
are important for the vertical alignment at the vertical font<br />
metrics, like the x-height or the ascender. At low resolutions,<br />
the rasterizer will try to vertically align the edges of all hinted<br />
horizontal stems that reach into an alignment zone. The<br />
horizontal hints must have their y coordinates in common<br />
with the nodes that are supposed to align. Since hints should<br />
not overlap one another, a single hint will do for all nodes it<br />
touches at its height.<br />
8.3.1 Stem Hints<br />
To add a stem hint to a glyph, right-click and choose Add<br />
Horizontal Hint or Add Vertical Hint from the context menu.<br />
A grey bar with a number badge will appear. The numbers<br />
indicate the origin (first number) and width (second number)<br />
of the hint. If you add a hint while two nodes are selected, the<br />
hint will be linked to these nodes right away. Adding linked<br />
<strong>Glyphs</strong> <strong>Handbook</strong>, May <strong>2013</strong> 70
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