What is slider on iPad?
While you're using an app, you can switch it to a Slide Over window—a smaller window that slides in front of another app or window—and open another app behind it. For example, while you're using the Photos app, you can have Messages open in a Slide Over window and carry on a conversation while looking at photos.
What is UI slider?
A control for selecting a single value from a continuous range of values.
What is slider in app?
The Slider Widget is a small widget that gives you control over the screen brightness and volume of your Android device from your home screen. It's convenient and very easy to use.