I have successfully changed the vertical list workspaces to grid workspaces on Ubuntu18.04 by following command and application.
sudo apt install gnome-tweaks
gnome-tweaks
gnome-tweaks -> Extensions -> workspace grid
However, I cannot how to change the keyboard setting of switching the workspaces.
I can use super+ctrl+j or k as the default settings, but I cannnot move the workspace horizontally.
Could you tell me how to solve this problem?
I think that one of possible solutions is assign new keyboardshortcut as command which switchs work spaces but I cannnot find this command.
(Please excuse my poor English.)