Samsung UN46ES7500FXZA E-Manual page 25

(Appears only if you have selected an
analog channel.)
Lets you assign a name of up to five
characters to an analog channel. For
example, Food, Golf, etc. This makes it
easier to find and select a channel.
●
Select All / Deselect All
Select all channels in the list. / Deselect
all channels you selected.
Display Icons Used in the Channel screens
: An analog channel.