I had a mouse where one was vertical and the other horizontal, but I seem to think the horizontal scroll was oriented horizontally. Having googled the mouse in the picture, it says one is programmable and suggests it starts with volume.
Why wouldn't there just be a small trackball on the nose, wouldn't that be more practical?
Because you'd be constantly changing your volume up and down slightly while scrolling.
For navigating a great big thing that benefits from two axis scrolling? Yes. For literally anything else a scroll wheel might be used for, like swapping weapons in games? No. The clickyness of the average scroll wheel is actually pretty useful and can't really be applied to a trackball.
I had a mouse where one was vertical and the other horizontal, but I seem to think the horizontal scroll was oriented horizontally. Having googled the mouse in the picture, it says one is programmable and suggests it starts with volume.
Why wouldn't there just be a small trackball on the nose, wouldn't that be more practical?
Because you'd be constantly changing your volume up and down slightly while scrolling.
For navigating a great big thing that benefits from two axis scrolling? Yes. For literally anything else a scroll wheel might be used for, like swapping weapons in games? No. The clickyness of the average scroll wheel is actually pretty useful and can't really be applied to a trackball.