UIToolkit/Viewport

While usin the UIToolkit I want to scale the viewport/preview on my screen for better visibility. I can set the scale to 25%,50%,75% etc, but I am not able to move the preview. My game size is 1080*2400 which means the the "bottom" is only visible if the scale is set to 25%. If I could move the view it would be a lot easier.