Common
```kotlin
object BackdropScaffoldDefaults
```
Contains useful defaults for [BackdropScaffold](/jetpack-compose/androidx.compose.material/material/components/BackdropScaffold).
## Properties
Common
```kotlin
val PeekHeight = 56.dp
```
The default peek height of the back layer.
Common
```kotlin
val HeaderHeight = 48.dp
```
The default header height of the front layer.
Common
```kotlin
val frontLayerShape: Shape
```
The default shape of the front layer.
Common
```kotlin
val FrontLayerElevation = 1.dp
```
The default elevation of the front layer.
Common
```kotlin
val frontLayerScrimColor: Color
```
The default color of the scrim applied to the front layer.
Common
```kotlin
val AnimationSpec: AnimationSpec
```
The default animation spec used by [BottomSheetScaffoldState](/jetpack-compose/androidx.compose.material/material/classes/BottomSheetScaffoldState).