How to create automate customizable message at the end of each game ?

After termination of a game, I often see Some player has "Good game, Well played!" message instantly. How to turn this feature on ?

First, go to preferences, then go to game behavior. Then scroll down until you get to "Say "Good game, well played" upon defeat or draw." Then click yes to get that.

@bubul99 @MrPushwood There is no customized message option, but you can have something open in another tab and copy and paste at the end of each game.