Using the Photoshop beta: I created/generated an image with the new Backdrop Creator tool in the Neural Filters, when you press OK after it's done generating, the images will be invisible on the canvas, they appear on the layer thumbnails, and you can transform them as if they were on the canvas, transforming them will change the thumbnail (For example: press CTRL+T will create a transform box around the canvas as if you could see something there, and scaling it down and pressing enter will scale it down in the layer thumbnail).