So now, while I am editing this article on my main screen, the screen beside it shows the outline or earlier draft I am working from — and, sometimes, Web sites or other documents I keep referring to.
When I edit photos, the second screen lets me compare the copy I am working on with the original, or shows tool palettes and thumbnails of other images, and I can blow up panoramic shots for closer viewing (though with a bar down the middle, like the central pillar of an old car’s windshield).
When I am shopping on the Web, my two screens let me compare products.
When I work on tables or spreadsheets, I can see all the columns at once. When I expect important messages, I keep my e-mail program open on the side monitor while I work on something else.