Enable The Hidden Multi-windows Mode On Android Marshmallow

Google released a new feature android m and some of which will be included in the android m in the final version, But there is a new feature, not yet published in the tone of its multi-window mode.
Finally, multi-window feature in the stock android version, it should arrive, it will update all devices to android m.
To obtain a multi-window mode, you need to modify build.prop system files to display in the developer options feature set.

Non-Rooted Users:-

On Your Phone, Go Into Recovery Mode By Volume Up + Power Key
Mount Your System By Going To Mounts -> Tick System.
Connect Your Phone Into Pc Via USB Cable
Now Go To Somewhere And Open Cmd There By Shift+mouse Right -> Command Prompt -> Open Cmd Here
Type Or Paste This Commands Then Hit Enter:

adb pull/system/build.prop

Open Build.prop File With Notepad++ Or Any Editor
Navigate The “ro.build.Type” Line.
Change It From: “ro.build.type=user” To “ro.build.type=userdebug”

Save This File
Go Back To The Command &type Or Paste This Commands Then Hit Enter:

adb push build.prop /system/

Now Open A Shell
Type Or Paste This Commands Then Hit Enter:

adb shell

Now An ADB Shell Will Open
Type Or Paste This Commands Then Hit Enter:

cd system

chmod 644 build.prop

Normally Reboot The Device.
After Phone Switch On Go To Developer Options.
Scroll Down To “drawing” Category.
You Will Find Multi-window Mode Enable It.
Now Enjoy This Features.

Rooted Users:-

Download Build.prop Editor Here.
Find The “ro.build.type=“ Line And.
Change It From:

ro.build.type=user
to:
ro.build.type=userdebug

Reboot When Prompted.
After Phone ‘switch On’ Go To Developer Options.
Scroll Down To “drawing” Category.
You Will Find Multi-window Mode Enable It.
Enable Multi-window And Have Some Fun!

Enjoy Multiple Windows On The Stock Android Cotton Candy Equipment. While The Feature May Be In The Experimental Stage It Can Be Quite Useful, And Sometimes, Especially In The Tablet. Try It And Let Us Know Your More Features Coming To Buy Android Views. Furthermore, For Drop Install In The Comments Below Your Queries.