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you use your TV's 16:9 mode most of the time.

If you have set Double (à, Œ) mode in PIP (Picture-in-Picture), you cannot adjust the Picture Size.

Auto Wide: Automatically adjusts the picture size to the 16:9 aspect ratios.

16:9: Adjusts the picture size to 16:9 for DVDs or wide broadcasting.

Wide Zoom: Magnifies the picture size more than 4:3.