EdLee, If the Synther finds the author property in the photo's meta data we use the text next to the copyright symbol when viewing the synth. You can add this information in Windows by right clicking on the photo, then clicking properties, then clicking on the details tab. You should see Author in the list. Most photo editing programs allow you to do the same thing. At this time there is no way to retroactively update the copyright.
The license symbol, either copyright or a variation of Creative Commons license is what lostinthetriangle was refering to. Hope this helps.