API Reference > appui-react > Utilities > FrameworkVisibility > useProximityOpacity useProximityOpacity useProximityOpacity: boolean Determines whether the proximity of the mouse should alter the opacity of a toolbar. Defaults to true. Defined in ui/appui-react/src/appui-react/framework/FrameworkVisibility.ts Line 31 Last Updated: 20 June, 2023