Shortcut: Essential controls for your phone
The 
Shortcut: Accessibility features
Easily turn accessibility features on/off from any screen. For each feature you're using, you can:
Add a button to the screen. The button fades when not in use.
If you set up multiple buttons, they display as a group; drag to reposition the group around the sides of the screen.
If you're using gesture navigation, you can set up a gesture instead of buttons.
Set your phone so that you press both Volume buttons to turn the feature on/off.
If you set this up for multiple accessibility features, you'll see a list of those features when you press both Volume buttons.

Open a large menu where you can:


If you're using gesture navigation:
Use two fingers to swipe up from the bottom of the screen.
If you're using 3-button navigation:

For each accessibility feature you're using, you can add a button to the screen to quickly turn the feature on/off.
When you turn on an accessibility feature in Settings > Accessibility, if the feature supports shortcuts, you'll see a switch to turn on the shortcut. Tap the switch's name to see options for adding the button and assigning the feature to the Volume buttons.
This setting applies to the shortcuts for all accessibility features.
If you're using 3-button navigation, tap Accessibility button.
If you're using gesture navigation, tap Accessibility button & gesture.
Adjust how the buttons look and work:

If you’re using gesture navigation, you can choose between using a gesture or a button for accessibility shortcuts. This setting applies to the shortcuts for all accessibility features.
You can press & hold the Volume buttons to turn accessibility features on/off.
Press & hold the Volume Up and Down buttons at the same time for three seconds.
If you assigned multiple accessibility features, you'll see a list. Tap a feature to it turn on/off.