Editorial should remember (optionally at best) the last view as well last edited cursor and page view scroll position for each document!
Especially on working / changing between several documents it drives me crazy to find / jump quickly to my last position. The same applies to changes between mark down edit (say any late in document position). Previewing to ckeck just the result of that edit I did just seconds before should not scroll to top of document…
If other users really prefer to start on top of documents (loading or previewing) this option of quick jump to last position could be simply bonded to long tap of the document manager choice resp. the preview button. And please remember at least a last search string per file (better a search history list).