When you look at the drill sheet, there should be lines between two places (i.e. thumb and ring, thumb and middle), or maybe just a box right between the two holes. That is your span. It should say on there if that number is "true" or cut to cut (meaning edge of hole to edge of hole without accounting for the grips)
Likewise, you will see arrows pointing in each direction from each of your holes. These are the pitches. You have two for each, either forward or reverse (or zero), and left or right lateral. Hope this was some help.