Screen your phone or tablet too large you need use a navigation bar but this think is quite difficult. Navigation Bar will help to behavior easy with navigation bar on your device.

[Featured]
✔ Support virtual navigation key with:

+ BACK KEY(Not Root).
+ HOME KEY.
+ RECENT TASK KEY.
+ SHOW NOTIFICATION.
+ LOCK SCREEN KEY

Easy move on screen
✔ Auto hide when you don't use
✔ Start on boot app.

[Guide User]
✔ Enable "Show Virtual Navigation Bar". and after enable Accessibility for app.
✔ Long press icon arrow move to hide Navigation Bar after tap notification to show again.
✔ Double tap arrow move icon to quick open rectask

Note!
✔ To use app please enable Accessibility for application.
✔ When application killed. Please wait for a few second to application initialize Service again and you can use it.

Navigation Bar is application free. Setup and enjoy!.
If you like Navigation Bar app don't forget rate 5 star ★★★★★ or review. They are appreciate for me. Thank you so much