Issue the set away command by clicking the "set away" toolbar button
(details).
The Set away command can be issued in a number of ways:
By clicking on the Set
away toolbar button.
By selecting the "Chat"->"Set Away From Computer"
menu command.
By hitting the <Ctrl>+<W> hotkey.
The 'Set away reason' window will appear (illustration).
"Set Away Reason" window
This window will contain a default away message that can be
composed in options or phonebook record settings. Enter an away
message text if desired and click on the Set Away button.