elpa-pdf-tools 1.1.0-3 (s390x binary) in ubuntu oracular

 This mode replace DocView for PDF files. The key difference is, that pages
 are created on-demand and stored in memory.
 .
 One can also get all kinds of information about a document, add
 annotation, copy and paste, follow link...
 .
 With synctex one can also get to the tex source of a part of a
 document.