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Natural Scroll or Reverse Scroll
Imagine a seen: You're reading an article and swipped your touchpad to scroll down, but the texts moved up! This isn't such a matter, but annoying frankly.
I've been using both methods for a long time. Here I'll provide some insights on it.
Natural means that the content scrolls naturally the same direction as your fingers move while Reverse is the opposite direction. But I think it's rather scrolling the viewport.
It is confusing that the screen and the touchpad are usually vertical, then what is "as your finger's direction"? Actually, in most times, we suppose that the screen and the touchpad are in a shape like _/ or even _._ where natural scroll seems to be obvious like you are dragging the content.
Some people uses their left hand to write while the others not. We should understand and respect others' custom and choice.