I've generated a map for field observations. We have attached photos for every registrations. I wanted the photos to show as thumbnails in the pop-up window, so I generated a column and copied the photo links there by hand. (Not very efficient, but I didn't find how to do it automatically.) The map with the thumbnails funcitioned well for some time and then the thumbnails suddenly disappeared. I made the whole copying process again and the same happened after a while. It seems that the photo links changed.
It is really annoying, specially in case of many photos. Is there a way to avoid this changing?
The best would be to get the links automatically in the atribute table and not changing over time.