Changing the shipping default

[sammy419]

During the checkout process on my site, I offer UPS & Fed Ex for shipping methods. Fed Ex is listed first followed by UPS (sort order). How can I change the green button from being defaulted to UPS to Fed Ex? I want to make Fed Ex my default shipping method with UPS optional.
Thanks in advance for any advice. I am if you can't already tell very new to Zen Cart.

[kobra]

I want to make Fed Ex my default shipping method with UPS optional.

Set the sort order in each module