LG 55EM970V.AEK User Manual page 29

HOME ➾ Settings ➙ OPTION ➙ Data Service
[Depending on country]
This function allows users to choose between MHEG (Digital Teletext) and Teletext
if both exist at the same time.
If only one of them exists, either MHEG or Teletext is enabled regardless of
which option you selected.