Thank you for this great software. I use 2 monitors (2k monitor & 4k monitor). And I set up the 4k monitor (as the 1st monitor) is below the 2k monitor (as the 2nd monitor). The problem is, when I choose a wallpaper for the 1st one, it will show up fully in the 2nd one +1/2 screen of the 1st one; when I choose a wallpaper for the 2nd one, I see nothing. But when I set up the 4k monitor is upper the 2k, it works smoothly.