Now why didn't I think of that earlier ...

I've just realised that now I have a decent monitor, I can actually have two documents side by side on the screen, with readable text and enough of it in the window not to have to scroll down after every paragraph. This makes grading different versions of student papers so much easier - I don't have to keep switching windows to see what they've done with my comments and corrections.

Yes, that's Zhang Ziyi peeping out from between the essays on epistemology and The Matrix.