Press Power + Home to unpin an app.
On Android 4.1 and lower, the Developer options screen is available by default. On Android 4.2 and higher, you must enable this screen as follows :
Note : Before enabling the Dark Mode, you need to change your phone’s theme to the classic version.
Soft resets are usually conducted in an attempt to fix malfunctioning applications or because they're required for software installation. Soft reset contrasts with hard reset, which removes all user data, settings and applications and returns a device to the same state it was in when it shipped from the factory.