You can change which buttons are displayed in the Home Touch Buttons Bar, as well as how they’re displayed.
Tap the Home Button > touch and hold the Recent Apps Button > Settings > Display > Home touch buttons.
Select the modification you want to change.
Tap Button combination to select which Home Touch Buttons you want in the bar and their location within the bar. Choose from the Back Button, the Home Button, the Recent Apps Button, the Notification Button, the Capture+ Button, the QSlide Button, and the Dual window Button.
Tap Color to set the button color. Choose White or Black.
Tap Hide Home touch buttons to hide the Home Touch Buttons on the apps you select. To access the Home Touch Button Bar from those apps, swipe upward from the bottom of the screen to temporarily redisplay them.