Read onscreen labels and change settings
You can use your voice to navigate any app on Apple TV. Siri can recognize the name of onscreen labels.
Use Siri to navigate the interface of an App. When you press and hold the Siri button and say the name of an onscreen control—such as the items in the menu bar at the top of the iTunes Movies store—Apple TV selects that control.
Use Siri to change settings. In Settings , press and hold the Siri button and speak a command you see onscreen to open or activate that setting.