Dear DU friends, help please. [View all]

How do I get out of Professional mode on Facebook. What is the option and how do I access it?
I think this mode is responsible for the huge list of contacts on my FB home page. I don't know these people.
I tried to google the answer but could not find it.
I want to go back to the old set-up.
Any ideas?
I guess I did not pay attention to the FB information.
Here I am and the whole world sees whatever I post. Will a change back get rid of this huge list of contacts?
Can you help?
Thanks,
PR