My original idea was to use different wallpapers for each monitor
in , I cannot choose a wallpaper at all.
When I press the windows button to pan between desktops, I can see the chosen wallpaper is there. But is overlayed with the same image.
When I turn Tweak tool, Desktop->Icons on Desktop to ON, I can choose any image I want as a wallpaper. But now I can't use nitrogen to overlay multiple images (one for each screen).
How can I resolve this?