Samsung PN51E490B4FXZA E-Manual page 27

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The picture size can vary depending on the input resolution when you
play content using Videos in A_Share Illl_ay.
HD (High Definition): 16'9 - 1080i/1080p (1920xl 080), 720p (1280x720)
You can adjust and store settings for each external device you have
connected to an input on the TV,
Picture Sizes available by Input Source:
DTV (1080i, 1080p)
DTV (720p)
DTV (480i, 480p), ATV, AV
Component (1080i, 1080p)
Component (720p)
Component (480i, 480p)
HDMI (720p, 1080i, 1080p)
16:% Wide Fi% 4:3_ Screen Fit
16:% Wide Fi% 4:3
16:% Zooml_ Zoom2_ 4:3
16:% Wide Fi% 4:3_ Screen Fit
16:% Wide Fi% 4:3
16:% Zooml_ Zoom2_ 4:3
16:% Wide Fi% 4:3_ Screen Fit