[How-to enable Multi-Window] [Z2 Tablet] [Flashable for SGP511] [Root] [Marshmallow]

This is simple edit of "build.prop" file in "root/system" folder. It enable experimental hidden multi-window view on your device. With root explorer or build.prop editor of your choice with r/w acces to system open "build.prop" -file and find this line "ro.build.type=user" and change it to "ro.build.type=userdebug" and save the file. Check that permission are 644 and reboot. Go to "Developer options" in settings and enable "Multi-window mode". Once enable "Multi-window mode" tap multitasking button and you find new button on left of x button. Tap the button and you will be asked where you want to position that app in the screen. Enjoy.
For SGP511 users I made flashable -.zip file that do the build.prop editing. Flash it via TWRP and enable "Multi-window mode" in developer options.

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