LG 55LV75D Manual page 75

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16:9 : This selection will allow you to adjust the picture horizontally, in linear proportion, to fill the entire
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screen (useful for viewing 4:3 formatted DVDs).
Just Scan : This Selection will allow you view the picture of best quality without loss of original picture
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in high resolution image. Note: If there is noise in original Picture, You can see the noise at the
edge.
Set By Program : Depending on the input signal, screen aspect ratio changes to 4:3 or 16:9.
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4:3 : This selection will allow you to view a picture with an original 4:3 aspect ratio, black bars will appear
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on both the left and right of the screen.
Zoom : This selection will allow you to view the picture without any alteration, while filling the entire
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screen. However, the top and bottom of the picture will be cropped.
Cinema Zoom1 : Choose Cinema Zoom when you want to enlarge the picture in correct proportion.
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Note: When enlarging or reducing the picture, the image may become distorted.