Although the Developer Options
menu is mostly used by application developers, there are some situations where you may find it helpful (such as USB debugging). This menu is hidden by default from Android 4.2, but you can activate it easily on Android 5.0
by following some simple instructions.
How To Enable Developer Options on Android 5.0
On your Android smartphone or tablet, go to Settings
> Device Information
Click the build number seven times to display Developer options
in the menu.