[b]Note:[/b] On Wear OS devices, rotary input is mapped to [constant BUTTON_WHEEL_UP] and [constant BUTTON_WHEEL_DOWN]. This can be changed to [constant BUTTON_WHEEL_LEFT] and [constant BUTTON_WHEEL_RIGHT] with the [member ProjectSettings.input_devices/pointing/android/rotary_input_scroll_axis] setting.
The amount (or delta) of the event. When used for high-precision scroll events, this indicates the scroll amount (vertical or horizontal). This is only supported on some platforms; the reported sensitivity varies depending on the platform. May be [code]0[/code] if not supported.