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# kCTTypesetterOptionDisableBidiProcessing

```
let kCTTypesetterOptionDisableBidiProcessing: CFString
```

## Discussion

Disables bidirectional processing. Value must be a CFBoolean object. Default value is `false`. Normally, typesetting applies the Unicode Bidirectional Algorithm as described in Unicode Standard Annex #9. If a typesetter is created with this option set to `true`, no directional reordering is performed, and any directional control characters are ignored.

---

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