---
title: "subscript(_:)"
framework: coremedia
role: symbol
role_heading: Instance Subscript
path: "coremedia/cmreadonlydatablockbuffer/blockregion/subscript(_:)"
---

# subscript(_:)

Accesses the data byte at the specified position.

## Declaration

```swift
subscript(position: CMReadOnlyDataBlockBuffer.BlockRegion.Index) -> UInt8 { get }
```