I edit on paper, too, then use that to guide me through my next cut on my computer. Easier to spot larger, structural issues that way and make parenthetical notes. Plus I can work anywhere without being tethered to some machine.I just finished editing a novel. My first two-three passes on any particular section are always done in pen-and-ink, on hard copy. Kaweco Sport Classic (black plastic), fine nib. I exclusively use J. Herbin Violette Pensee carts. Then I transfer my notes/suggestions/corrections to my computer to send back to the author. I must be the last editor alive who doesn't edit directly on a computer.