Can I edit my thread?

I posted a thread but forgot to attach the pattern.  Can I edit the original thread to add the attachment or do I have to create a new thread altogether?  I dont have permission to contact the moderator directly so Im posting my question here.

greenteas

EDIT thread is possible in a time zone of 24h after posting

jademonkey

Thanks.  Ill wait the full 24 hours and see about editing.  If I cant Ill repost the thread.