Originally Posted by kovidgoyal
As for switching title and author, there isn't an option to do it in bulk. In the advanced section of the config dialog however, you can swap the order in which title and author are detected from the filename (you will have to re-import after doing this).
I think the ability to switch title and author directly in Calibre's Library list (either to a single selected book, or multiple selections) would be a tremendous convenience. After importing new books, I often find that the title and author have been read into each other's places.