If you have an Apple TV, then you would have probably gone through the entire settings menu on it. The primary settings menu on Apple TV has enough features to configure things as we like and I am pretty sure you would have mastered the Settings app of Apple TV by now.
But what you don't know is that there's a secret advanced Settings menu as well, which can be revealed with a small trick. This hidden Settings menu contains different configuration options, which you should not mess with. So do not change anything unless you know what you are doing. Anyways, let's get to the guide and understand how to reveal this secret Settings menu.
How to Reveal Secret Advanced Settings Menu on Apple TV
Step #1. On your Apple TV, go to Settings
Step#2. Go to System → Software Updates.
Step #3. Now quickly press Play/Pause button 4 times and a new menu shall appear with a title “Advanced Settings.”
Step #4. In this secret Settings menu, you can change certain technical things. If you change any value and wish to get it to default, then simply highlight that particular setting option and press Play/Pause button.
Apart from this, there's one more secret menu to get the demo mode on Apple TV. To get that, go to Settings → General and select About. Now press Play/Pause button 4 times quickly to get Retail Demo Configuration menu.
That's all folks!