Select Pitch, Chip, or Flop shot mode and you can access a different putting green grid that you can move by putting your cursor on the aiming square and holding down the left mouse button.
By moving the grid you can more closely see what the contours are close to the hole.
On longer putts put the ball and the hole in the same grid column for a more accurate read of the break.
You have to switch back to Putt to, well putt.