Alan Cooper

to minimize mouse movement

First-time users either will be clever enough to learn from the ToolTips or will learn more slowly, but just as reliably, from other, parallel, pedagogic command vectors.

Clicking either side of the switch or, on mobile, swiping in the appropriate direction slides the switch’s 3D affordance to the on or off position. These are handy in Settings screens on mobile apps, where many app functions often can be selectively turned on and off. They are less common, and somewhat more awkward to use, in desktop and web apps.