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:
At the top of the Developer options screen, you can toggle the options on and off (figure 1). You probably want to keep this on. When off, most options are disabled except those that don’t require communication between the device and your development computer.
Next, you should scroll down a little and enable USB debugging. This allows Android Studio and other SDK tools to recognize your device when connected via USB, so you can use the debugger and other tools.
The rest of this page describes some of the other options available on this screen.