Muskrat: Try Hack Builder (
https://www.mobileread.com/forums/showthread.php?t=13185). It will let you select your hacks and configure your buttons however you like.
The total is the total pages changed since you've reset the value. It's meant to help people figure out how many page flips they're getting on a battery charge. Or, to help you keep track of the total pages you've read in a certain time frame.