How to Change Xbox 360 Display Settingsby Michael Butler
Microsoft designed the Xbox 360 to work with a wide variety of TVs. The display settings that look the best on one TV will not necessarily be the best on another. For example, on a high-definition TV, you should use a 16:9 aspect ratio. However, on a non-HD TV you would want to use a 4:3 aspect ratio. You can also change other display settings, like resolution and coloring.
Press the "Start" button to go to the Xbox 360 menu. Use the analog stick to navigate to the "My Xbox" panel.
Scroll to "System Settings," and then press the "A" button.
Highlight "Console Settings." Press the "A" button.
Scroll to "Display" and press "A" again. Change the display settings to make them appropriate for your TV.