What are the different image licenses listed in "Image Rights"?

Rights-Managed (RM)

Rights-Managed, or RM for short, is a type of license to use stock photos that can be purchased at stock photography agencies. This license type is sold under a one-time-use basis. It allows the buyer to use the picture in a certain specific way, and in that way only.


Royalty-Free

This license type grants the buyer a determined set of rights to use the image in multiple ways, for a flat, one-time fee. This means you pay for the license only once, and you can use it forever within the accepted ways, without any further payment obligations.

The photographer who created the photo is still the owner of the photo. He/she holds the copyright, the official term pointing the ownership of the photos.
Retaining copyright is what allows photographers and to sell their work multiple times and generate more income. These photos are not copyright-free or free images at all. Stock agencies sell licenses that give the buyers the right to use the photos, but they don't transfer the copyright, the ownership of the images.


Creative Commons

CC0 – Creative Commons Zero
Allows creators to give up their copyright and put their works into the worldwide public domain. CC0 will enable re-users to distribute, remix, adapt, and build upon the material in any medium or format, with no conditions.

CC BY – This license allows re-users to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use.

CC BY-SA – This license allows re-users to distribute, remix, adapt, and build upon the material in any medium or format, so long as attribution is given to the creator. The license allows for commercial use. If you remix, adapt or build upon the material, you must license the modified content under identical terms.

CC BY-ND – This license allows re-users to copy and distribute the material in any medium or format in unadapted form only, and only so long as attribution is given to the creator. The license allows for commercial use. 

CC BY-NC – This license allows re-users to distribute, remix, adapt, and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator. 

CC BY-NC-SA – This license allows re-users to distribute, remix, adapt, and build upon the material in any medium or format for non-commercial purposes only, and only so long as attribution is given to the creator. If you remix, adapt or build upon the material, you must license the modified content under identical terms. 

CC BY-NC-ND – This license allows re-users to copy and distribute the material in any medium or format in unadapted form only for non-commercial purposes, and only so long as attribution is given to the creator. 


Public Domain Mark

Public Domain Mark enables works that are no longer restricted by copyright to be marked as such in a standard and simple way, making them easily discoverable and available to others. Many cultural heritage institutions including museums, libraries, and other curators are knowledgeable about the copyright status of paintings, books and manuscripts, photographs, and other works in their collections, many of which are old and no longer under copyright.