Index -> Playing the Game -> The Game Screen -> Chat Log -> Chat Log Options

The button at the bottom of the Chat Log allows you to filter what types of messages will be displayed in the log. Simply click on it to toggle between options.

This option displays all player chat and game messages. This is the default setting.

This option displays only player chat. You won't see any game messages.

This option displays only game messages. You won't see any player chat.