---
title: backIndicatorTransitionMaskImage
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uinavigationbarappearance/backindicatortransitionmaskimage
---

# backIndicatorTransitionMaskImage

The image for masking content flowing under the back indicator image during push and pop transitions.

## Declaration

```swift
var backIndicatorTransitionMaskImage: UIImage { get }
```

## See Also

### Configuring the Back button

- [backButtonAppearance](uikit/uinavigationbarappearance/backbuttonappearance.md)
- [backIndicatorImage](uikit/uinavigationbarappearance/backindicatorimage.md)
- [setBackIndicatorImage(_:transitionMaskImage:)](uikit/uinavigationbarappearance/setbackindicatorimage(_:transitionmaskimage:).md)