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# CVAttachmentMode

The propagation modes of a Core Video buffer attachment.

```
enum CVAttachmentMode
```

## Overview

You set these attributes when adding attachments to a [`CVBuffer`](/documentation/CoreVideo/CVBuffer) object.

## Topics

### Constants

[`CVAttachmentMode.shouldNotPropagate`](/documentation/CoreVideo/CVAttachmentMode/shouldNotPropagate)

Indicates to not propagate the attachment.

[`CVAttachmentMode.shouldPropagate`](/documentation/CoreVideo/CVAttachmentMode/shouldPropagate)

Indicates to copy the attachment.


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