ruff english translation (thx Google Translate! ;->):
"The space used for displaying the cover in the tag panel is quite small, which I also find useful. After all, you don't want the tag panel to be excessively large and leave enough space for other fields. Every now and then I would like to have the cover displayed in large size so that I can see details. I therefore suggest a quasi ZOOM function when clicking on the cover, which allows the standard software set in the system to display the cover in its original size. If …"