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# CMAttachmentMode

The mode to use when propagating attachments.

```
typealias CMAttachmentMode = UInt32
```

## Discussion

Set these attributes when adding attachments to a [`CMAttachmentBearer`](/documentation/CoreMedia/CMAttachmentBearer) object.

## Topics

### Modes

[`kCMAttachmentMode_ShouldNotPropagate`](/documentation/CoreMedia/kCMAttachmentMode_ShouldNotPropagate)

A mode that doesn’t propagate attachments to another object.

[`kCMAttachmentMode_ShouldPropagate`](/documentation/CoreMedia/kCMAttachmentMode_ShouldPropagate)

A mode that propagates attachments to another object.


---

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