A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
Do you mean you're zooming in to a slide and scroll to the top / bottom and it jumps to the next slide? Yep that annoys the **** out of me too. There's no real solution but what we do is (temporarily) add a couple of shapes on the slide master. One an inch or so above the top and another below the bottom. Not an ideal answer but it helps the rage.