When I want to scroll quickly through a document, I click and drag on the little scroll… ball/stick (not sure what it’s called), which is in the scroll bar, and I can move it freely up and down until I find the page I want. But sometimes, when I try to drag the scroll ball/stick, it just jumps down a little bit, and I can’t drag it anywhere at all.
Why is it doing that? How can I make it behave like a normal scroll bar? Is this some setting that I need to disable/enable, or is it perhaps a glitch or bug in the application itself?