Settings: Display, Scrolling

With Kinetic Scrolling, the document will keep moving for a moment when you pan the document with your finger, and remove the finger from the screen immediately.

Disable Kinetic Scrolling

Choose Extras Settings Display Scrolling and uncheck the Kinetic Scrolling option to make scrolling stop immediately after removing your finger from the screen when panning the document.

Hide Scroll Bars

Choose Extras Settings Display Scrolling and check the Hide scrollbars in full screen mode or Hide scrollbars in regular mode option to hide the scroll bars. This might make sense if you have a touch enabled device and don't really need the scroll bars.