---
title: kUnicodeLeftToRightMask
framework: Core Services
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/1433620-directionality_masks/kunicodelefttorightmask
---

# kUnicodeLeftToRightMask

## Declaration

```occ
kUnicodeLeftToRightMask = kUnicodeLeftToRight << kUnicodeDirectionalityBits
```

## Discussion

Discussion A mask for setting the global, or base, line direction for the text being converted. The value kUnicodeLeftToRightMask tells the converter that the base paragraph direction is left to right. This determines which direction the converter should use for resolution of neutral coded characters, such as spaces that occur between sets of coded characters having different directions—for example, between Latin and Arabic characters—rendering ambiguous the direction of the space character.