The experimental PDF viewer is great. However, it is very much a separate web app, launching into its own tab, with a “Back to Paperpile” button. It would be great if the viewer could be part of Paperile, such that you could be viewing a paper, say, on the right-hand side of the Paperpile window, with the rest of the Paperile UI on the left.
Being able to view/read/annotate papers without having to leave Paperpile would make the research workflow that much more efficient. Bonus points if there are easy keyboard navigation shortcuts to go back and forth between using the PDF reader “sub-window” and the current Paperpile UI.