How to enable Split Screen on OSX el capitan?

Question

macOS

Updated and this coveted split mode does not work, I know how to use it, one of the options is to grab the button that makes the window full screen, but my window does not react to it in any way.
How to turn it on?

Answer 1

To activate the Split View mode, on the first window you need to hold the green button for about a second, then it will open to half the screen. In the second half of the screen, you will be prompted to choose from the remaining windows, when you click on any of them, it will also open to the entire second half of the screen...

plus System Preferences > Mission Control > Displays have separate spaces
emnip, not all software supports this feature.