Skout Indexing Your Barrel?

So before too long, and once the holiday ruckus is over; I'll begin setting up my new EVO. One of the features this gun has, that my other PCPs does not, is the easy barrel indexing feature. Now the question becomes "how to make proper use of it"?
Should one just center their scope, then indexing the barrels POI to closest point of natural center of the scope, and adjust the scope from there? Or, is there more to it?