Focus Area setting in CSM Menu

[MyNikon]

Hi fellow Nikonians.
I have a question to ask about the Focus Area setting in the CSM Menu.
There 2 options - No Wrap, Wrap.
What I would like to know is, what is it used for?
I've tried using both settings but can't really tell if there were any differences.
The manual doesn't clearly explained its use so I hope someone can enlighten me.
Thanks in advance.

 

[snowspeeder]

It has something to do with selecting the focusing point with the up/down/left/right button.

 

[MyNikon]

Finally got what the manual says after reading it again and again.
Thanks.