Can somebody tell me how to change my settings to “threaded mode”? I see it included in the details but in my control panel I only have two options, last post first or first post first - both in linear. Thanks so much 
I just tried my own Quick Links pull-down menu to edit options, but I don’t see any modes listed but linear, oldest first, and linear, newest first.
Please ask follow-up questions as needed.
Under Help and Rules:
What are the various thread display options?
When viewing a thread, you will be able to view the thread from a choice of four modes.
Linear Mode (Oldest First) - In this mode, posts are displayed chronologically from oldest to newest. Posts are shown in a flat mode so that many posts can be viewed simultaneously.
Linear Mode (Newest First) - This is the same as the above mode, except that posts are ordered in an opposite way (newest first).
Threaded Mode - In this mode, a tree is shown along with every post. This tree allows you to see the relationship each post has to others, in terms of who responded to whom. Only one post is shown at a time.
Hybrid Mode - This mode is a mixture of the linear and threaded modes. The post tree is displayed like in the threaded mode, but multiple posts are displayed simultaneously like in the linear modes.
That may be boilerplate language from the makers of PHP forum software that doesn’t apply to CC’s settings.