Samsung included plenty of customization options for its new, virtual navbar at the bottom of the Galaxy S8 and S8+. With the ability to rearrange the on-screen keys' order, or to change the color, the new Experience UI looks like something out of a modded ROM, or an Android overlay coming from China. In any case, those features were more than welcome, but Samsung piled on with its subsequent software updates, giving us the option to easily show and hide the navbar itself in all apps, except the homecreen or app drawer, of course. Here's what you need to do to play hide and seek on your S8 or S8+.
1. If you have the latest updates installed on your Galaxy S8 and S8+, go to Settings>Display>Navigation bar, and turn on the new "Show and hide button" option;
2. A small dot will appear in the left corner of the navbar.;
3. Tap on the dot to hide the navbar in any app you like, it will reappear once you go back to the home screen.