LG 55LM760T User Manual page 171

✎ A gesture may not be recognised in the following cases.
- If Motion Recognition
: Set it to On.
- If any other menu than the motion recognition controller is displayed on the
TV screen,
: Make it disappear.
- If you are watching TV using a set-top box,
: Select TV
is set to
in the INPUT menu.
Off in HOME ➾ Settings ➙ OPTION,