Physically writing on glossy photographs

[JmPhotos]

Use a marker created for scrapbookers who write on slick surfaces called a Slick Writer. They are made by American Crafts. You might find them at your local hobby store, Michaels, Hobby Lobby, JoAnns, etc or local scrapbook store.
As soon as you write with them, they dry instantly and never smear. They are also acid free, archival safe.