dotphoto’s small-print lab has installed new back-printing equipment that will again reliably print on the back of small photos including 4×6, 4xD, and 5×7.
The default back-print is the photo file name or caption and the photo capture date or upload date. The back-print field is 40 characters long.
You can set your default back-printing in your dotphoto account’s Printing Options.
How to Print Captions, Dates, and Custom Text on the back of your photos