In gnome 3.28 on ubuntu 18.04
SUPER+← snaps a window to the left SUPER+→ snaps a window to the right
These actions are called "View split on Left" or "View Split on Right" in the list of Gnome keyboard shortcuts in Settings. Once windows have been snapped, one can then drag the location of the split (which defaults to center) to the left or right, giving more room to one window and less to the other (and any subsequently snapped windows obey this new split location). IMO it is a beautiful and polished implementation.
My question is how to move the default split location away from center. I love having an 80 character wide terminal window on the right (which takes up less than half my 16:9 screen's width) and giving the wider, remaining space to a browser window on the left. Basically, I want to avoid manually dragging the left/right snap boundary after a reboot. Here is a screenshot of split windows with my preferred boundary location:
Note how the the snapped windows no longer have rounded edges, but take up the entire rectangular area on either side of the split.
Since the split location can be altered with a mouse drag, perhaps this variable can be programmatically set on boot? Perhaps, though, the variable is reset upon an initial window snap and there is no way to force this... Perhaps I should just switch to a tiled wm like dwm xD but gnome is otherwise fine for me.