Image to Image generates an image from an image. Image size must be at least 512x512 and maximum height and/or width has to be less than 1024px.
How much influence the original image has on the diffusion process. Values close to 0 will yield images very similar to the original image while values close to 1 will yield images wildly different than the original image.
How strictly the diffusion process adheres to the prompt text (higher values keep your image closer to your prompt).
Number of diffusion steps to run. The greater the number, the more detail.
It is useful only if your PNG image has transparent parts and the size of the image (or the aspect ratio) is equal to the canvas. The overlay image will over all objects on the canvas and will be stretched to fit the canvas.