Limited space to display distorted images

[ghost]

In the case of having more than 5 levels of image distortions, some distorted images at the bottom in the scrolling list will be invisible. In this case, for example, it would be very strange for the observer to insert distorted image 7 in front of distorted image 1. The situation can be even worse if there are more image distortion levels. One possible solution could be moving all distorted images or the scrolling bar automatically when the observer drag the image distortions.