How to use tvOS Control Center on an Apple TV set-top box

Control Center gives you quick access to settings and controls for switching users, playing music, accessing HomeKit cameras and scenes, putting Apple TV to sleep, and more. 

You can quickly switch between users in Control Center so that each person gets their own unique Up Next video list, video and music collections, Game Center data, and recommendations.

To open Control Center, on the Siri Remote press and holds the TV button.

To switch to or add another user:

1. Press and hold the TV button on the Siri Remote to open Control Center.
2. Select a user or select Add User and follow the onscreen instructions.
   Tip: If your profile on Apple TV has voice recognition set up, press and hold the Siri button on the Siri Remote and say, “Switch to my profile.”
   
   When you switch to another user, the previous user is signed out, and the TV and Music apps refresh with the new user’s unique Up Next lists, video or music collections, and recommendations. Switching users doesn’tchange the Photos app or other settings associated with an iCloud account.

To put the Apple TV set-top box to sleep:

1. Press and hold the TV button on the Siri Remote to open Control Center.
2. Select Sleep.
   (This how-to is based on my experiences and info on Apple’s support pages.)