Enhanced full text pdfs are made available through an integration with the PDF viewer from Readcube (part of the Digital Science group). The enhanced pdf from Readcube allows you to directly click on the authors and citations in the text and go directly to the linked references. As well as just reading through the paper, the Readcube viewer gives quicker access to figures and supplementary information as well as the reference list, export of the citation, and examination of the related Altmetric attention score.