Samsung UN55ES6150 E-Manual page 64

N
Available with HD 1080i / 720p
signals in 16:9 mode.
4:3: Sets the picture to basic (4:3)
mode.
N
Do not set your TV to 4:3 format for
a long time. The borders displayed
on the left and right, or top and
bottom of the screen may cause
image retention (screen burn) which
is not covered by the warranty.
Screen Fit: When your TV inputs HDMI