Writting Greek with LyX

[Stefanidis Stathis]

 Hello,
 I have installed  LyX ver 1.1.6 and i was trying to find out how to
write
 in greek.I have installed the greek keybord, but still i cannot see
greek
 letters. I would be grateful if you could guide me how to do that with
 LyX. 
 Many Thanks!!
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