If you access Artstor (library.artstor.org) from your institution's computer network, the database will recognize your IP address and you will be granted access to Artstor's core content automatically. However, to download images you must register for an account. With a registered account you can also curate groups of images, share them, and download them directly into PowerPoint presentations.
If you are accessing Artstor from off-campus without logging in you will only see Artstor's Public Collections. Logging in with your registered account gives you the ability to access an additional 2.5 million images from museums, libraries, archives, scholars, and artists and artist's estates that are restricted from public view.
There are two ways to register for an Artstor account:
After you have registered for an account, you will have 120 days of remote access. After 120 days you will need to log in to Artstor from a computer on campus--or through your library’s proxy--in order to reset your remote access for another 120 days.
If you visit library.artstor.org and see this screen, you do not have IP-based access and must log in with your registered account.