---
title: preferredDynamicRange
framework: coreimage
role: symbol
role_heading: Instance Property
path: coreimage/cisystemtonemap/preferreddynamicrange
---

# preferredDynamicRange

Specifies the preferred dynamic range behavior of the tone mapping. The value should be kCIDynamicRangeStandard, kCIDynamicRangeConstrainedHigh, kCIDynamicRangeHigh or nil.  If nil then it will behave as kCIDynamicRangeHigh.

## Declaration

```swift
var preferredDynamicRange: CIDynamicRangeOption? { get set }
```