Can more than 1 member edit a thread.

[MockingJay]

Can more than one member edit a thread.

 

[Lothiriel]

Each member can edit only their own posts. Moderators and administrators can edit all posts, and admins can change the starter if a thread if the original poster asks them to. Pages/articles in the Learning Center can have their editing settings put to only the original creator, certain members, or anybody.