What is the difference between threaded view and non-threaded view?
The Threaded View function will show the response posts of a discussion arranged in a sub-thread format. The replies are listed under the actual message that was open/being read when the “Reply to this Message” link was clicked. In the Non-threaded view, all response posts will show up as a response to the main post (chronological order under the main post), similar to the digest version of an email list. You can switch back and forth between these views by clicking the Threaded/Non-threaded view link found at the top of the forum page.