Within a gallery, picdrop automatically scans your images for repetitive behavior in the file names. These name parts, which are always the same from file to file, are then hidden in the image overview. This ensures that only the relevant file numbers are displayed. Your gallery will be clearer and communication with your clients will be easier. Of course, the complete file name is always displayed in the large image view.
If you don't like the automatic file shortcut, you can simply disable it in your account settings.