If you need to reply privately to a student, check the Reply privately box.
The relevant student will see the reply on the Forum, but it will not be visible to other students. A message will display: This is a private reply.
Splitting a discussion means that beginning with the post selected and going to the end of that sub-thread, the posts are cut from the current discussion topic and placed into a newly created discussion topic. If a discussion has strayed away from the original topic, splitting the discussion can provide new attention and space for the tangent discussion while keeping the original discussion on topic.
Discussion subscriptions are not retained when a post is split
If a student posts a new topic to the wrong Forum you can move that discussion and any replies attached to another Forum on the same module.
Sections are bolded in the Move this discussion to... menu to help you find the right Forum if you have a number of forums with similar names.