The orientation for the glyphs of the font.
- iOS 3.2+
- macOS 10.5+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Text
The value associated with this key is an integer represented as a
CFNumber object containing one of the constants in
CTFont. If you want to receive vertical metrics from a font for vertical rendering, specify
k. If unspecified, the font uses its native orientation.