I am using linkdirectory where I set a picture. The URL call by the cms to display the picture in the BO is : http://.../plugins/cms/binaryMetadata/picture?objectId=directoryLink://f7f8d091-567b-4c54-8f4f-bc459349f0d1&maxWidth=100&maxHeight=100&foo=0.4804154009242303
This is zooming on the picture.