Common
```kotlin
object FloatingActionButtonDefaults
```
Contains the default values used by [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton)
## Properties
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi val MediumIconSize = FabMediumTokens.IconSize
```
The recommended size of the icon inside a [MediumFloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/MediumFloatingActionButton).
Common
```kotlin
val LargeIconSize = 36.dp // TODO: FabLargeTokens.IconSize is incorrect
```
The recommended size of the icon inside a [LargeFloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/LargeFloatingActionButton).
Common
```kotlin
val shape: Shape
```
Default shape for a floating action button.
Common
```kotlin
val smallShape: Shape
```
Default shape for a small floating action button.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val mediumShape: Shape
```
Default shape for a medium floating action button.
Common
```kotlin
val largeShape: Shape
```
Default shape for a large floating action button.
Common
```kotlin
val extendedFabShape: Shape
```
Default shape for an extended floating action button.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val smallExtendedFabShape: Shape
```
Default shape for a small extended floating action button.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val mediumExtendedFabShape: Shape
```
Default shape for a medium extended floating action button.
Common
```kotlin
@ExperimentalMaterial3ExpressiveApi
val largeExtendedFabShape: Shape
```
Default shape for a large extended floating action button.
Common
```kotlin
val containerColor: Color
```
Default container color for a floating action button.
## Functions
elevation
```kotlin
@Composable
fun elevation(
defaultElevation: Dp = FabPrimaryContainerTokens.ContainerElevation,
pressedElevation: Dp = FabPrimaryContainerTokens.PressedContainerElevation,
focusedElevation: Dp = FabPrimaryContainerTokens.FocusedContainerElevation,
hoveredElevation: Dp = FabPrimaryContainerTokens.HoveredContainerElevation,
): FloatingActionButtonElevation
```
Creates a [FloatingActionButtonElevation](/jetpack-compose/androidx.compose.material3/material3/classes/FloatingActionButtonElevation) that represents the elevation of a
[FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) in different states. For use cases in which a less prominent
[FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is possible consider the [loweredElevation](#loweredelevation).
#### Parameters
| | |
| --- | --- |
| defaultElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) has no other [Interaction](/jetpack-compose/androidx.compose.foundation/foundation/interfaces/Interaction)s. |
| pressedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is pressed. |
| focusedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is focused. |
| hoveredElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is hovered. |
loweredElevation
```kotlin
@Composable
fun loweredElevation(
defaultElevation: Dp = ElevationTokens.Level1,
pressedElevation: Dp = ElevationTokens.Level1,
focusedElevation: Dp = ElevationTokens.Level1,
hoveredElevation: Dp = ElevationTokens.Level2,
): FloatingActionButtonElevation
```
Use this to create a [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) with a lowered elevation for less emphasis. Use
[elevation](#elevation) to get a normal [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton).
#### Parameters
| | |
| --- | --- |
| defaultElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) has no other [Interaction](/jetpack-compose/androidx.compose.foundation/foundation/interfaces/Interaction)s. |
| pressedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is pressed. |
| focusedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is focused. |
| hoveredElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is hovered. |
bottomAppBarFabElevation
```kotlin
fun bottomAppBarFabElevation(
defaultElevation: Dp = 0.dp,
pressedElevation: Dp = 0.dp,
focusedElevation: Dp = 0.dp,
hoveredElevation: Dp = 0.dp,
): FloatingActionButtonElevation
```
Use this to create a [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) that represents the default elevation of a
[FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) used for [BottomAppBar](/jetpack-compose/androidx.compose.material3/material3/components/BottomAppBar) in different states.
#### Parameters
| | |
| --- | --- |
| defaultElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) has no other [Interaction](/jetpack-compose/androidx.compose.foundation/foundation/interfaces/Interaction)s. |
| pressedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is pressed. |
| focusedElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is focused. |
| hoveredElevation | the elevation used when the [FloatingActionButton](/jetpack-compose/androidx.compose.material3/material3/components/FloatingActionButton) is hovered. |