[Q] LG P714 Beginners Accounts questions topic

Hi All,
I have a brand new LG P714 phone.

1) How to remove phonebook sources
I now import contacts from the Sim card, phone itself, and gmail.
I want to extract contacts ONLY from gmail.
How can I do it?
2)
I want to remove the gmail account I am using from the phone, and associate it with a new one.
How can I remove an account (How to add is plain and simple but we cannot figure out how to remove)

BTW:
I don't want to root this phone.