1. The Caption: Here is where you link the name of the work and the photographer name to the site in which you found the photo.
2. The Content Source Box: Here is where you copy and paste the link in your search bar box to the original photo you are uploading for that is the content (the photo) source (where you found it on Flickr/500px)
3. The Click-Through Link: Here goes the exact same thing as Number two. You can link the photo to the original OR to the photographers main page.
More help on sourcing, visit: sourcethephotographer.tumblr.com
because people were asking about how to source with the new (not so new anymore) layout







