need urgent help

[AC Question]

I have a problem in my Samsung s5 its model is SM-9008 AND ITS version is 4.4.2 some of app. in the setting menu does not open live multiscreen-air view .. how to fix this please any ideas..thanks

 

[STARGATE]

I'm not sure what you are trying to accomplish.
There is multiwindow and air view, but I don't remember multiscreen-air view.

 

[Walid Abdallah]

I mean that multi-window and some app in the settings does not open to enable or disable.. when I tap on them nothing happen..i thing there some problem in my setting or some missing files how to fix it ...