It is possible for each member to edit their own posts, moderators and myself can also edit other members posts.
The main use for the edit option is to be able to fix things like an overly large image that has been posted and is scrolling the thread, to delete the avatars people have chosen on the avatars thread, or to fix formatting issues when someone has used copy and paste from a newspaper article or Microsoft Word.
Edit can also be used for people to edit a mistake they made and want to change or if a post needs to be editted because it contains real names or swearing.
So the first think I am going to do is post a picture here.
The I come back and save it, delete it and then resize the image then re insert the image the instruction are on click here