---
title: alphaChannelMode
framework: corevideo
role: symbol
role_heading: Type Property
path: corevideo/cvimagebufferattachmentkeydefinitions/alphachannelmode
---

# alphaChannelMode

Determines how the alpha channel should be rendered.

## Declaration

```swift
static var alphaChannelMode: CVAttachmentKeyDefinition<Self.ShouldPropagate, CVImageAlphaChannelMode> { get }
```