One of the best tweaks is that you can switch between capacitive buttons under the display and on - screen software buttons with a simple tap in the settings menu. (androidauthority.com)
On each side of it is a hidden pair of capacitive touch buttons, in which all of these can be disabled in favor of software buttons if you wish. (androidheadlines.com)
They're often Bluetooth, have actual keys with spaces in between them, and include some of the Android software buttons so you don't have to poke the screen every 30 seconds. (androidcentral.com)