please tell me how to edit a started discussion

Australia
April 12, 2010 7:37am CST
HI everyone, I am a new comer here and I finding myself already in trouble to get around here! I started a discussion but accidently pressed send button before I changed my heading for the discussion. So I end up a meaningless heading with grammar error! I tried to edit it but can not find how to do it, is there anyone can explain how this work to me please ???
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