Boooom! Android M preview is out. For those that already flashed it, there might be a really really cool thing for you to try. In fact, Android M comes with multiwindow. It’s experimental but seems to be working. Let’s try it out!
Let’s change a line to enable userdebug mode. Change the line:
Reboot your phone. Navigate to developer options in settings (to enable dev options, go to “about phone” and tap on “build number” several times).
Open recents and boom, you have it.