To lock melds during the game, tap on the gear icon in the top-left corner of the game. A dropdown menu will appear. (add screenshot here)
- Then tap on the open lock icon. (add screenshot here)
- The icon will display a closed lock once you have successfully locked your melds. You can unlock your melds by following the same steps, but the icon will go from closed to open. (add screenshot here)
The meld protection settings are saved on your account, you therefore only need to activate it once for it to apply to all of your games.