LG 47LM9600 Owner's Manual page 96

HOME Settings
View subtitles when the TV station provides subtitled programing. Program
subtitles work only on digital/analog broadcasts or external input.
Change Caption to
CC 1-4
Displays the audio portion of a TV program as text on the TV screen.
CC1 is the most common mode in use.
Mode
Field 1 data channels: two Captions (CC1, CC2), two Text (T1, T2).
Field 2 data channels: two Captions (CC3, CC4), two Text (T3, T4).
Service 1-6
This is only available for the digital broadcasting system.
OPTION
On and select caption setting.
(Closed Captioning) /
Caption
Text 1-4 Text 1-4