Samsung UN55ES8000GXZE - Manual (Page 54)

the image is clear.
N Select the channel, and then select
Fine Tune .
N Fine tuned channels that have been
saved are marked with an asterisk “*”
on the right-hand side of the channel
number in the channel banner.
N To reset fine-tuning, select the
channel, select Fine Tune , and then
select Reset on the Fine Tune screen.