function set_yoffset()
    local screen= SCREENMAN:GetTopScreen()
    for i, pn in ipairs(GAMESTATE:GetEnabledPlayers()) do
        local field= find_notefield_in_gameplay(screen, pn)
        if field then
            for i, col in ipairs(field:get_columns()) do col:get_reverse_offset_pixels():set_value(20)
            end;
        end;
    end;
end;