There was a time when Facebook striped your photos from all IPTC (International Press Telecommunications Council) data and that was pretty annoying.
These days you can keep your Title / Object name or Headline field and Description / Caption Field (in that order). In case you have filled Title / Object name and Headline you won’t see Headline, but if you have only Headline without Title / Object name then you will see it – easy 🙂
So you have to fill these two fields with the data you want. It’s pain in the ass because you can’t use your already filled author, copyright, web…fields but at least you have something you can use.
I use it to enter description and my name with copyright sign and it looks like this in Photomechanic
And this is how it looks on Facebook when it’s uploaded.
Sure, you can do this directly on Facebook, photo by photo, copy/paste, but I like it more this way.