Panasonic TH-42PHW5 Operating Instructions Manual page 22

I ASPECT Controls
The Plasma Display will allow you to enjoy viewing the picture at its maximum size, including wide screen cinema format
picture.
ASPECT
C3
ASPECT button
The aspect mode changes each time the ASPECT button
is pressed.
Notes:
(1) During RGB and PC input signal modes, the mode switches
between "NORMAL", "ZOOM" and "FULL" only.
(2) For a 1,125i (1,080i), 750p (720p) signal input during
"COMPONENT" input signal mode, the mode is set to "FULL"
mode, and switching is not possible.
For a 525i (480i), 625i (575i), 525p (480p) and 625p (575p) signal
input during "COMPONENT" input signal mode, "Panasonic AUTO"
cannot be selected.
(3) The aspect mode is memorized separately for each input terminal
(VIDEO (S VIDEO), COMPONENT, RGB and PC).
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