How to Change Apple TV Resolution Settings
There's regular television and then there's Apple TV. The Apple TV receiver is a device that allows users to display digital content on their high definition television set. That means you can access Internet media such as Netflix and your iTunes library. But all of Apple TV's bells and whistles won't be of much use if your television is set to an improper resolution. The wrong resolution set on your screen may distort images or fail to display them at all. If you use Apple TV and need to change your resolution settings, you can do so using your Apple remote.
Press the "Menu" button on your Apple remote and the plus sign button on your remote at the same time.
Hold the buttons down until display resolution options appear.
Press the plus sign button or the minus sign button on your remote to choose a resolution option.
Press the "Play/Pause" button on your remote when you find a suitable resolution to enable the new resolution setting.