You may ask yourself what I mean. It is simple to explain. When I zoomed in with a 15 inch screen to edit an image everything worked fine. That was until I zoomed to fit. Instead of changing where I was zoomed, I moved the picture. ??? This creates another problem. I can move the picture back where it was at the beginning if I get lucky. If I do this, a bigger problem occurs. I usually work zoomed in with the pen or paintbrush. If I move the picture back, everything I corrected is in the wrong place. Since my notebook computer only has one size monitor, anything not in the center of the phot is impossible to work with.