 
Instant messaging
After you join an IM group, you can view the messages 
that are exchanged there, and send your own messages.
To send a message, write the message in the message 
editor field, and press 
.
To send a private message to a participant, select
Options
>
Send private msg.
.
To reply to a private message sent to you, select the 
message and 
Options
>
Reply
.
To invite IM contacts who are online to join the IM group, 
select 
Options
>
Send invitation
.
To prevent receiving messages from certain participants, 
select 
Options
>
Blocking options
.