Right now, if I click an internal link in a PDF (e.g. a citation) in the PDF viewer, I have to scroll back to wherever in the document I was when I clicked it. This can be really frustrating when clicking many citations, and often I find myself working around it by having another copy of the PDF open to the references section (though this is still pretty unideal). Many PDF viewers (e.g. PDF Expert) will feature a convenient button to allow you to jump back to where you clicked the internal link from.
