Some people prefer to have their contacts listed by surname, others by first name.

To set your preferred listing method, click on Settings in the top navigation menu:


This will bring you to the Settings page.


You'll see two columns. By default, you should have Preferences already highlighted. In the second column, click on Address Book. This will bring up the Address Book options:

The second option is List contacts as. Here, choose how you prefer contacts to be listed in your Address Book:
Now choose which column you would like to be able to toggle, so that you can set your contacts to be listed either A to Z, or Z to A.
Finally, click on the Save button.