---
title: channels
framework: Application Services
role: symbol
role_heading: Instance Property
platforms: [macOS 10.0+]
path: applicationservices/cmvideocardgammatable/1560665-channels
---

# channels

Number of gamma channels (1 or 3). If `channels` is set to 1 then the red, green, and blue lookup tables (LUTs) of the video card will be loaded with the same data. If `channels` is set to 3, then if the video card supports separate red, green, and blue LUTs, then the video card LUTs will be loaded with the data for the three channels from the `data` array.

## Declaration

```occ
UInt16 channels;
```