How to add a puff reset page to current theme?

[RealRobC]

I have a really easy theme I love to use, however I am obsessed with resetting my puff count to help me keep track of my batteries life span. I really like the dark simple theme but it doesn’t have puff reset page. I know in theme designer I could probably add a page. Just don’t know how to do it. Any help or direction would be appreciated. Thank you 

[Wayneo]

The easiest thing for you is to find a theme that already has it and do the same for yours. IIRC Frank's theme among many others have a puff reset.