Changing from First Person to Third Person

I started a project using the tutorials and everything is going fine. I am well into creating my first terrain map and I have begun to place brushes and sculpt structures. The project has a first person character and I want to change to a third person character. Ive imported a third person character into the game files but I have no idea how to convert my project from automatically using the first person character. Thanks in advance for any advice.

You mean as in the player can have both First and Third person camera views?

If so its very simple to do try watching this video: