One benefit of changing your Vizio TV's standard-definition 480i format to high-definition 1080i format is that it helps to protect your screen from burn-in. Stationary images such as logos and black bars commonly cause burn-in if left on the screen for a while. Leftover shadows of those images remain on the screen when burn-in has occurred. The 480i signals use a 4-to-3 aspect ratio and display standard broadcasts in the traditional screen size. Black bars are seen on the left and right sides of the screen. Overall, the widescreen 1080i,16-to-9 aspect ratio may be a better choice for longer periods of TV viewing.
Press the "Menu" button in the middle of the navigation wheel on the remote control, and then press the down arrow button and select "Setup."
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Press the "Enter" button, and then press the down arrow button and highlight "Wide."
Press the left or right arrow button and select "Panoramic" for HDTV 1080i signal source screen format, where the picture is expanded on all sides to fill screen. Select "Wide" for the HDTV 1080i signal source screen format to keep the picture proportionate across the screen. Black bars will appear at the top and bottom of the screen. Alternatively, select the "Normal" mode to display the 480i signal source screen format using the 4-to-3 aspect ratio, where black bars display on the sides of the screen.
Depending on the source of the 1080i HDTV signal, some programming may still display black bars at the top and bottom of the screen.