Download the LibKey Nomad Chrome browser extension and select "University of California, Santa Cruz" as the library institution once it's installed. 

• From a journal's webpage a publisher's site:

If the UCSC Library subscribes to the journal, the Access Options button provides direct access to the full text of the article.

For articles available through interlibrary loan, Access Options button sends users to a record in Search that allows them to easily request the article using the Request through Interlibrary Loan link. The Nomad Access Options button will appear even if you're not logged in to OCA or the VPN, but you'll be sent to a login screen to access the PDF.

See an example journal page:

• From a regular web page that contain full citations:

If the UCSC Library subscribes to the journal, the buttons appear near the citation with direct access to the full text of the article.

See an example from Wikipedia: