Control Centre
Control Centre provides quick access to useful controls — including Wi-Fi, AirDrop, Sound, Displays, Focus and more — from one location in the menu bar, so it’s easy to adjust settings as needed. Control Centre also displays an orange dot next to its icon to indicate when apps are using a microphone on your Mac, and shows which apps are using it.
To open Control Centre on your Mac, click Control Centre 
in the menu bar. To customise Control Centre, choose Apple menu 
.