I propose to handle a middle mouse button as an image scrolling activator. It will be useful when we have to work with big or zoomed image.

When using this program I have noticed one weakness. It is a moving and zooming comfort. I propose to handle a middle mouse button as an image scrolling activator. In this program we cannot simple scroll. Even keyboard arrows doesn't work.
I also propose to handle the mouse roller as a zoom tool.

This is something like in Adobe Reader or even gimp. Without it, the work is somewhat frustrating, especially when we have to work with big or zoomed image.

Zooming can be activated via keyboard short-cut, but scrolling doesn't have even that!