Opening Chat
Pressing Enter opens the chat console. By typing in this window, you can send messages to the other summoners in your game. Clicking Send Team lets you talk to your allied players without letting the enemy see. Clicking Send All shares your thoughts to everyone in the game who has enabled All Chat in the Options menu. By default, pressing Enter again sends your message to your team. If the chat console is empty, Enter simply closes it instead.
Private messages
Private messages, or whispers, are messages only a specific summoner will receive. Type /whisper or /w, followed by the player’s summoner name, followed by the message to send.
/whisper SteveMcQueen The nine-tailed fox jumped over the lazy yordle.
Typing /reply or /r into the chat console will automatically send a message to the summoner who last whispered you. A summoner must be on your friends list to receive private messages from you.
Muting or ignoring players
For a number of reasons, there may come a time when you want to stop receiving messages from a fellow summoner. To do this, hold Tab to open the scoreboard and click on the mute button next to the summoner you’d like to silence.
Alternately, type /mute followed by the offending player’s summoner name into the chat console. Repeating this process will unmute them.