I think I figured out how to use it.
Let's say your opponent's stats show up in your HUD as 36/2 and he just limped.
What I would do is enter 36 in the 1st box to show what he calls with (those light red marks). Then the 2nd box excludes some hands from his range depending on the action. I'd put 2 in the 2nd box since he didn't raise (exclude what he would raise with). When I did that in the 2nd box, it cleared the AA, KK, QQ, and JJ spaces.
Now to me, this shows his pre-flop limping range.
Now maybe someone might know how to use this info once we have it and how to proceed post-flop. But here's a start, I guess.