Proofing on screen or on paper
Authors tend to treat proofing as one job done in two places, and then argue with themselves about which place is better. It is not one job. A screen and a sheet of paper fail at different things, and knowing which faults belong to which medium is the difference between two proof copies and five.
What the screen is better at
Anything searchable. This is the screen's real advantage and it is enormous. Your character is McAllister in fourteen chapters and MacAllister in one — a search finds it in seconds, and no amount of careful reading on paper reliably will. The same goes for a doubled word if you search for the common ones, a place name that drifted, a title spelled two ways between the cover and the copyright page, and straight quotes left among curly ones.
Links and anything clickable. In an ebook, every internal link, every contents entry, every footnote and its return. You have to click them, and you can only click them on a device. See Checking an ebook before you publish it.
Metadata. Title, subtitle, series number, author name, ISBN, categories, the description. All text in fields, all checked by reading and comparing, none of it improved by printing.
Anything you can zoom into. Artwork at 100 percent, the edge of a barcode block, whether a hairline rule is really there. Paper gives you one fixed size; a screen gives you every size.
The rhythm of the book. Open the print PDF in a viewer set to two-up with a cover page, so the pages pair as they will when bound, and scroll. You are not reading — you are watching the shape of the book go past. Chapter openings that land inconsistently, part titles in the wrong place: visible in a couple of minutes.
What only paper catches
Color. Everything about it. What the ink actually did to your cover, how dark the dark areas really went, whether the two tones you distinguished on a backlit panel are still distinguishable. See Why your cover prints darker than it looked.
Ink density and how heavy the page feels. Type that looked comfortable on screen can print dense and tiring, or thin and underfed, and you cannot tell which until you hold it.
The gutter. The inside margin only exists once the book is bound. Until then it is arithmetic. Open the proof flat in the middle, where the binding pulls hardest, and see whether the innermost words are readable without flattening the spine with your palm.
The margins in the hand. Whether they feel generous or mean is a judgment your hands make, not your eyes.
The spine. Whether the title sits centered between the two folds, whether anything has wrapped, whether the spine color continues the front. A millimeter is invisible in a file and obvious on a table.
Typos. This is the one people refuse to believe. A great many readers simply cannot see their own errors on a screen and see them immediately on paper.
Why paper finds what you have read forty times
Three reasons, and they compound.
The page does not move. A screen scrolls, reflows and glows, and your eye tracks a moving target. A printed page is fixed, so your attention has somewhere to settle.
The medium is unfamiliar. You wrote this on a screen, edited it on a screen and read it back on a screen forty times, and by now you are reading what you meant rather than what is there. Changing the physical form breaks that loop — which is also why reading aloud works. See Proofreading your own work, and when to stop.
The object gives your eye a frame. Fixed edges let you see alignment, spacing and rhythm as relationships rather than as a stream.
In the tools. Previews are free, unlimited and watermarked, so the screen pass can run as long as you want — rebuild the cover, re-export the interior, look again, at no cost and with nothing committed. What you pay for is removing the watermark, not the checking. Start a book → · about the tools
The order that wastes the least money
Fix everything you can find on screen first. Every paper proof costs money and takes days, so spending one of them on an error a search would have found is pure waste. Run the searches, click the links, check the fields, scroll the spreads. See Preflight: what to check before you upload.
Then order one proof, and check the physical things in one deliberate pass. Not a skim on the day it lands. Sit down with the book and a pen and work the physical list front to back — The proof checklist, front to back is that list.
Then, if you changed anything substantial, order one more. Substantial means the page count moved, the trim changed, or you replaced the cover art. If you only fixed three typos, the next copy you see can be the first one you sell.
What a screen genuinely cannot show you
Four things, and no monitor setting fixes any of them.
Color accuracy. A screen makes color from light and paper makes it from ink, and the ink range is the smaller one.
Paper color and show-through. Whether cream reads warm or yellow to you, and whether the type on the back of a page is faintly visible through it. Both depend on the stock in your hands.
The real trim. Pages are cut in a stack after binding, and the cut wanders slightly. Where the edge landed relative to your margins is a fact about a physical object.
Weight and feel. The thing that decides, in the first two seconds, whether a reader thinks this looks like a real book or a printed manuscript. Nobody has ever judged that from a PDF.
And the trap in the middle: a preview is still a screen. Ours are accurate to the file, which is a different claim from being accurate to the printed sheet. No preview anywhere is the paper.
Make yours
Everything here is built into the tools, and they are free to use: name your book, bring your manuscript or your artwork, and work as long as you like. You only pay when you want the files without the preview watermark.
Next: Order the proof. Then read it in daylight · More: The proof checklist, front to back · Preflight: what to check before you upload · The proof came back wrong. Now what?