To copy a file from one album to another, just drag/drop the file to the album where you would like to make a copy.
ATTENTION: this method will not make a real copy of your file (thus it will not consume additional publication capacity). To definitively delete the photo from your Joomeo space, you must delete it from each album.
Maybe now is a good time to take a few minutes to see the main functions offered by Joomeo. We have prepared a few tutorials and videos on this topic for you: