hoverElevation property

The z-coordinate at which to place this button relative to its parent when the button is enabled and has a pointer hovering over it.

This controls the size of the shadow below the floating action button.

Defaults to 8, the appropriate elevation for floating action buttons while they have a pointer hovering over them. The value is always non-negative.

See also:

• elevation, the default elevation.
• highlightElevation, the elevation when the button is pressed.
• disabledElevation, the elevation when the button is disabled.