This sort of behavior — called 'bistability' — is familiar to anyone who has operated an old-fashion 'snap-action' light switch (as explained, for example, in Wikipedia), which toggles abruptly between lights on and lights off as the lever is pushed beyond the central position.
When you have one of the menus open, you'll see an 'arrow and line' icon on the right, which toggles (switches) the menu between appearing at the top, or on the left of the screen.
They're still around, most recently co-opted by Burberry, above, which showed toggles on bright coats that were short or long, trench or otherwise, and even on a sweater.
As well as having a daily alarm that can be toggled on or off, there is also an hourly chime which can be toggled independently.
Some cars have a mandatory "line-lock" which prevents the rear brakes from engaging when the brake pedal is depressed (which can be toggled on and off).
It then turned these "interesting activity" recommendations into push notification on iOS and Android, which you could toggle on or off.
Currently, the site features sources like Hacker News, Dribbble, Behance and Designer News, for example, which you can toggle on and off to customize your view.
For Windows 10 whether this comes in the form of pre-install update notifications (which can be toggled on or off) or more granular control over each individual update, doesn't really matter.
The app, which is also notably more expensive than the earlier version, includes improvements to its natural language processing engine, as well as the introduction of new features, such as "calendar sets," which let users toggle on and off various groupings of calendars and reminder lists.
Barnes & Noble representatives say that the new screen illumination technology, which can be toggled on and off, makes its new NOOK Simple Touch the only device with a screen that is really readable both in direct sunlight as well as in the dark.
