you can interact with your device by simply setting up some switches. Eg. you can control your phone's volume by creating some switches like blinking eyes,opening mouth and many more.
Thanks for being with Samsung and sharing your concern. We would like to inform you that please check the below mentioned information for Universal switch :
* You can control the touch screen by connecting an external switch, by tapping the screen, or by using head movements and face gestures.
* Launch the Settings app, tap Accessibility → Dexterity and interaction → Universal switch, and then tap the switch to activate it. If the universal switches are not registered on the device, tap ADD SWITCH and set switches to control the device.
* To activate the universal switch feature, at least one switch must be registered on the device. To set switches to control the device, tap SETTINGS → Switches. To deactivate this feature, press the Power key and the Volume Up key simultaneously. Be sure to hit ♡ when you find an answer that works for you.
