How to organize threading

Does anyone know where the setting is to organize the visual threading.

As is now in a thread, I see one reply after the other based on time. then I will see who the reply was responding to in right upper corner of their message. Also I a little drop arrow “reply” if someone replied to someone else’s comment.

Is there a way to get it back to looking like the following?

Comment Person 1
— reply Person 2
— reply person 3

The above could be collapsed to Person 1

further replies
Comment Person 4
Comment Person 5
Comment Person 6
— reply Person x
– reply person z

again the Person 6 could be collapsed.

Hope this makes sense. Otherwise I see one long list of every comment and reply and it takes up a lot of screen and it not always obvious what is being commented on.