"Game tools" is a useful function that is linked in the navigation bar. with them it is possible to display a menu during the game, where notifications and media sounds can be switched on/off. also, depending on the model, the game graphics, mostly only the frame rate, can be adjusted.

Android 9 | LG UX 9.0
Game tools -  Open the  Settings
Game tools -  Tap on  General
Game tools -  Tap on  Gaming
Game tools -  Enable or Disable  Game tools
  1. Open the Settings
  2. Tap on General
  3. Tap on Gaming
  4. Enable or Disable Game tools

LG Instructions