How To: Unlock the Hidden Multi-Window Mode in Android 6.0 Marshmallow

Unlock the Hidden Multi-Window Mode in Android 6.0 Marshmallow

Manufacturers like Samsung and LG have added their own implementation of multi-window features to Android for years now, but with the release of version 6.0 Marshmallow, Google has finally gotten around to working the same feature into stock Android.

The feature still has a few rough edges, so it's hidden by default, and you'll need root access to activate it. But by adding a single line of code to your build.prop file, you can now use multi-window mode with any app on Android, so you can multitask like a pro with true split-screen views.


Step 1: Modify Your build.prop File

First up, open your favorite root-enabled file browser with text editing capabilities, then navigate to the root partition of your device, which is the highest folder you can get to in the folder tree. From here, open the system folder, then make sure to mount it as "read/write" so that you can make changes to the files it contains.

Next, scroll to the bottom of this folder and long-press the build.prop file. From here, choose "Open With," then select "Text Editor" or a similar entry in your root-enabled file browser.

Once you've got the build.prop file opened in a text editor, scroll down to the very bottom of the list and hit enter on your keyboard to add a new line. From here copy the following line of code, then paste it into the bottom of your build.prop file:

  • persist.sys.debug.multi_window=true

Step 2: Save Changes & Reboot

After adding the line that enables multi-window mode on Marshmallow, tap the three-dot menu button at the top of your text editor and choose "Save." From here, simply reboot your phone to make the changes become active.

Step 3: Use Marshmallow's Multi-Window Mode

Once you get back up, you'll be ready to use Marshmallow's multi-window feature. To begin, open your recent apps menu, then you'll notice a new button directly to the left of the "X" in each of the app title bars.

Tap this button, then you'll be asked to choose the multi-window layout for this app. The first option makes the app occupy the top half of your screen, the second option puts it in the bottom half, and the third bumps the app back into full screen mode.

For now, the second app in your split-screen view is automatically selected, meaning after you choose a layout for your first split-screen app, the other half of the window is populated by the adjacent entry in your recent apps menu. If you'd like to change the secondary app, open the recent apps menu and swipe it away, then the next app will be used instead.

Multi-window mode works in either landscape or portrait mode, and each app can be controlled as you would expect. Currently, there is no way to resize the two windows, but it's still quite useful as it is.

This early implementation of multi-window mode still has a few quirks, but once you get used to it, the feature goes a long way towards helping you multitask more efficiently. How are you liking it so far? Let us know in the comment section below, or drop us a line on Android Hacks' Facebook or Twitter, or Gadget Hacks' Facebook, Google+, or Twitter.

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I would love to have this feature on my phone can I do this with the Droid Turbo? Just got this phone about a month ago from Verizon. Does it support this? Have no idea what marshmallow is. If so can you give me the directions on how to do this in more layman's terms! I am not very savvy on computer or phone technology terms. Have no idea what a root enabled file browser is or any of the other terms are that you mentioned. Would really appreciate any help you can give me. As this feature would make my life much easier with the tasks I need to do on a daily basis. My email is or text is 832-334-9347. Thank you for your help!!


Unfortunately, you can't do this with the Droid Turbo because it doesn't have the latest version of Android yet, which this little tweak requires. Marshmallow is the name of the latest version of Android (which itself is the operating system that most phones run on), and it's only available to Google's own Nexus devices right now.

To explain the Marshmallow bit and give you a bit of fun background, each Android version has a code name that's derived from some sort of dessert, and they go in alphabetical order. So Android version 1.5 was Cupcake, 1.6 was Donut, 2.0 through 2.1 were Eclair, 2.2 was Froyo, 2.3 was Gingerbread, 3.0 was Honeycomb, 4.0 was Ice Cream Sandwich, 4.1 through 4.3 were Jelly Bean, 4.4 was KitKat, 5.0 through 5.1 were Lollipop, and 6.0 is Marshmallow.

I've just bought a Leagoo M8 Pro running on 6.0 Marshmallow this month. The device's square button doesn't perform multitasking like a Sony Xperia Z1 model C6903 does. Luckily for me, I've already experienced solving the problem with my Leagoo Alfa 4 which runs on 4.4 KitKat. I just pressed and hold the circle button (middle button) for a few seconds until the multi-windows appears and Walla, problem solved.

can i do this .... on honor 4x kirin 620 ????

I'm not sure if it would work, but it shouldn't harm anything to try. To be on the safe side, just make a backup copy of your build.prop file before you edit it, then if it doesn't work, replace the modified version with the backup copy.

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