Hi there and welcome
What you saw for name and author is what it adds to the metadata of the photo, this you do not see on the photo itself.
The camera does not provide watermarking but what you can do is use this free online service to add a watermark to your photos
Then upload the copy with the watermark to Facebook.
If you would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.
ok, then you would need a program for this, this one will do it in a batch for you
Sorry? Extract what to?
You can extract it anywhere you wish on your computer
Desktop is one place