Can't poosition Raw Image behind Canvas

Hello everyone, how are you? I’m fine.
I made an animation in a Raw Image and I want to position that behind my Canvas, but I can’t, and the Raw Image is above the Canvas.

In the Rect transform the Z position is -1 and in Sorting layers the position is -1 too, but I cant put it behind the Canvas
Does anybody can help me?

Thanks, Mauro

Create a second canvas behind the first one and place the image on that canvas. UI images need to be the child of a canvas.