scaling the image in AppDesigner

Hello, I have a problem. I want to view matrix as a gray image. I Insert in IUFigure UIAxes, because I think it is the best way. Now, I have a problem, because when I want to show image created from small matrix (e.g. 5x5) it's too small to view, and I can't use rollers in mouse to zoom in/out.

So, independently whether I use a small matrix or a large one, I would like to get a 'picture' of one size, which will not be blurred, and I could use a scrool to zoom out/in.