At the moment you input a search and it finds results by searching through ALL fields of the papers. By specify a target I mean specify whether I am searching in the author/title/whatever field.
You're right, if I can remember all of those details it's quite easy to find a paper, but this kind of misses the point, maybe I only remember the author, or only some parts of the title. B
Additionally I'm not always looking for a specific paper but a set of papers and it is hard to make a decent search when the search will trawl through abstracts, multiple authors names titles tags, notes etc and bring out far too wide a selection.