Designology

How do you assign a specific thumbnail to a note? I have many images in many notes. When there is more than one image, EN does not always take the topmost (first) image as the note's thumbnail image. In addition, even if you "trick" EN to use a given image as the thumbnail by creating the note with only one image initially then adding others after the thumbnail has been generated, EN will sometimes reassign the thumbnail image to one of the subsequent images within the note. This is frustrating when these thumbnails are instrumental in quickly identifying notes, but there seems to be no predictable way to control them. Perhaps this should be a field in the note header area where you "Click to set thumbnail image" would work. Any advice would be appreciated. Thanks, Steve & Angela