In ubuntu 16.04, I used
ctrl + alt + [1-9] (on the num-keypad) to resize a window to take either the top-left, top-right, bottom-left or bottom-right corner.
In ubuntu 18.04, in settings > devices > keyboard, I only see View split on left,right, which is good to occupy the screen with two windows. I'd like to occupy my screen with 4 windows without overlap.
How to resize 4 windows to occupy the screen without overlap on Ubuntu 18.04?