Adding home screen on Android Kitkat stock launcher

Adding home screen on Android Kitkat stock launcher

There is no direct setting to set the number of home screens for Android Kitkat stock launcher. 
To add the new home screen you simply hold the home screen it will show you the options for adding widget or changing wallpaper or adding application to home screen as shown below.

Now just select any widget and you will see automatically created new home screen for making room for new widget to place as shown below.