File viewer pop-out full-screen
For more user-friendly and efficient use of file viewer, file viewer should be able to pop-out to full-screen (whatever screen size may be).
It could work in analogy to what is possible with embedded video, where one can pop-out the video to full-screen.
Additionally, zoom and pan options should be available as is common in PDF viewers.
This would then allow a real efficient use of already existing features as linked document libraries, because the two- (or three)-column view is just too small to be very useful for professional documentation.
This would also solve the issue of other related suggestions: https://sharepoint.uservoice.com/forums/329214-sites-and-collaboration/suggestions/33948010-file-viewer-web-part-needs-view-size-option