In the SPIRIT what is the name of the Front page?

Hello,
I want customize the SPIRIT demo over time, but I want to save the existing pages to modify at a later date. When I'm in UPFRONT if I change something it's changed and I want to change a copy of it so I can start over while prototyping. What is the name of the front page? Is this possible with SPIRIT? In other themes I'd copy their pages and customize, but I always had their stuff as a fall back in case I went astray.

Thanks!
DrMJ