The picture above was taken by Alexei Watson who states that the new stock recovery in Android L has a few new features. You can now Reboot to Bootloader, and Power down.

Most Android phones these days come with a locked bootloaderâ the program that boots up the operating systemâ so users canâ t replace the stock OS or gain root access by default. The bootloader has to ...

HIGHLIGHTS A step by step guide to help you unlock your Android's phone bootloader and install a Recovery.

First off, the bootloader isn't part of Android, it's what lets the device boot into Android. Device manufacturers generally want you to stick to the version of Android they preloaded on the device.

What these two commands do is simple. the first one is basically telling your computer to tell your computer to reboot the Nexus 5 to the bootloader.

The unlock button will reboot your device, unlock the bootloader, wipe all your data, and then return you to the Android 4.1 setup screen.