Windows 10 has at least two styles. One where the arrow is a triangle and the other it's a chevron (as in the example). System 8 (and Next) were odd in the up

Windows 10 has at least two styles. One where the arrow is a triangle and the other it's a chevron (as in the example). System 8 (and Next) were odd in the up and down arrows were on top of each other. That works for the initial scroll or if there is only one scroll movement, if there are more than one in a given direction, it becomes annoying (if you're using a mouse on the arrows to move the bar).