Review a digital book proof twice before approving it. Read the first pass as a reader: check the title details, text, page order, intentional blanks, page turns, and double-page scenes. Use the second pass for production: check page size, trim and bleed indicators, margins, gutter, images, fonts, cover placement, spine, and barcode area. Put every correction in one page-specific list, request a revised proof, and begin again at page one. A screen proof cannot confirm exact printed color, paper feel, binding, weight, or final trimming.
What is a digital book proof?
A digital book proof is the prepared version you review before printing is approved. It may be a PDF, an online preview, or another provider-specific view. It is not automatically the same file you uploaded, and it is not a photograph of the finished book.
The proof should show the pages, sequence, and cover as prepared for the selected workflow. It gives you one last chance to find a missing page, a shifted caption, a bad crop, a blank that disappeared, or cover text that moved too close to an edge.
Different providers handle this step differently. Amazon KDP requires authors to use Print Previewer and recommends checking every page. IngramSpark provides a rasterized PDF eproof after processing. YourBookBound sends a digital proof for approval before production. Use the instructions attached to the proof you actually receive.
Do not approve on a quick thumbnail scan. A proof can look tidy from a distance while hiding a single missing line, a wrong page side, or a cover detail under the barcode area.
Prepare before reviewing
Close the editable layout and save the version you submitted. Give that source file and the proof clear version names. A simple pattern such as BookTitle-interior-v07 and BookTitle-proof-v07 helps prevent corrections from being applied to the wrong file.
Review on the largest reliable screen available. Download the proof when the provider allows it instead of relying only on a small browser window. Turn off notifications, allow enough time to finish one full pass, and keep a correction sheet open beside the proof.
Have these details nearby:
- the approved title, author name, and any subtitle;
- the expected page count and intentional blank pages;
- the selected trim, binding, and cover type;
- the current cover template or production specification;
- the final text or source file used for comparison.
If another person will review the book, give each reviewer a separate pass and one shared deadline. Combining comments as they arrive is easier than revising the file five times from five overlapping lists.
Pass 1: read the proof as a book
Begin at the front and move through every page in order. Do not start with the page that had the last correction. Approval covers the complete proof, including pages that were not supposed to change.
Check names and front matter
Compare the cover, title page, copyright page, headers, and any dedication. Look for small differences in author initials, punctuation, edition details, and title capitalization. KDP specifically warns that book details should match the manuscript and cover.
Read every line
Read the text at a comfortable zoom. Watch for missing words, repeated lines, broken characters, substituted fonts, unexpected hyphenation, clipped descenders, and text that moved onto the next page. A spelling checker will not catch a correct word in the wrong sentence.
Confirm page sequence and blanks
Check that pages appear in ordinary reading order and that every deliberate blank remains. In a conventional left-to-right book, confirm that scenes land on the intended left or right page. One removed blank can move every later spread to the opposite pairing.
Review page turns and spreads
Switch to a facing-page view if the proof supports it, or compare page pairs manually. Check reveals, repeated illustrations, chapter openings, and artwork that crosses the binding. A two-page scene can be correct as separate PDF pages and still fail as a reading spread if its halves meet in the wrong place.
Pass 2: check the proof as a production file
The second pass is slower and less literary. Zoom in. Inspect edges, corners, small type, fine lines, and every place where content approaches trim or the binding.
Page size, trim, and bleed
Confirm that every interior page uses the expected dimensions and orientation. If the proof shows trim or bleed indicators, inspect them on pages with full backgrounds. Background art should reach the required outer area, while text and important faces should remain inside the safe content area specified for the job.
Do not assume a warning is harmless because the page looks correct. KDP says Print Previewer checks items including margins, cover size, and fonts. When the previewer finds an issue, its guidance is to correct the original file and upload a new version.
Margins and gutter
Look at text blocks, captions, page numbers, speech bubbles, and small visual clues. Compare left and right pages separately because the inside edge changes sides. Keep precise details away from the binding unless the selected construction and template allow otherwise.
Images, lines, and fonts
Inspect images at useful zoom levels for soft focus, accidental pixelation, missing graphics, transparency changes, and thin lines that have faded. Confirm that bold, italic, accented characters, symbols, and handwriting fonts still look like the source.
Acrobat Pro’s Output Preview can inspect separations, color warnings, page boxes, ink coverage, and object details. These tools help diagnose a PDF, but they still do not reproduce every condition of the press and paper.
Cover, spine, and barcode area
Review the cover separately from the interior. Check front, back, spine, wrap or hinge areas, and the barcode zone shown by the current template. Confirm that no text disappeared under an overlay and that the front cover remains on the correct side of the prepared spread.
Spine placement depends on the final interior and production route. If page count, paper, binding, or trim changed, do not approve an old cover proof without confirming that the current template was used.
Record corrections so they can be verified
Write one correction per line. Include the proof page number, printed page number when different, location, observed problem, and expected result.
| Proof page | Location | Problem | Expected change |
|---|---|---|---|
| 7 | Bottom caption | Last word is clipped | Show the complete sentence inside the safe area |
| 18 | Center of spread | Character’s eye falls into the binding | Move the face away from the center |
| Cover | Back lower right | Text enters barcode zone | Move the text clear of the marked area |
Avoid comments such as “fix spacing throughout” or “image looks wrong.” Name the affected page and what should change. If the same problem repeats, list the range and verify every page in that range after revision.
Send one consolidated list. When the revised proof arrives, check each requested correction first, then restart both passes from the beginning. A correction to one paragraph can change line breaks, pagination, page pairings, and the cover spine.
Worked example: one correction that moves the rest of the book
Consider a fictional 32-page family memoir. The interior begins with a title page, a deliberately blank reverse and two introduction pages. Printed page 1 begins on PDF page 5. For the numbered main text, the initial relationship is PDF page = printed page + 4. This is a property of this example file, not a universal rule.
On PDF page 17, printed page 13, a caption says “September 1998.” The supplied family record says “September 1989.” Another reviewer asks to add a 90-word explanation before that photograph. These are two separate changes: one corrects a date; the other may change pagination. Recording both as “fix page 13” invites a mistake.
Use stable issue IDs. Write the original words and exact replacement, then identify the affected object as well as its current page. Page locations can change; a caption for the school-gate photograph is still identifiable after a paragraph moves.
| Issue | Original location | Instruction | Recheck after revision |
|---|---|---|---|
| C01 | Proof-v02 PDF17 / printed13, school-gate caption | Replace “September 1998” with “September 1989”; family record supplied separately | Find the school-gate image in v03 and compare the whole caption, not just the last digit |
| C02 | Proof-v02 PDF16 / printed12, end of paragraph2 | Insert the approved 90-word passage from correction file C02; reflow normally | Check continuation, image pairing, contents references and all subsequent page turns |
| C03 | Cover-v02, back-cover lower paragraph | Correct the family surname from “Marin” to “Martin” | Check cover-v03 and search the interior for the same surname; do not alter another person’s legitimate name automatically |
Suppose the added passage pushes one page into the next section. The layout now has 33 content pages. The designer may need to change the layout or add a deliberate blank to meet the agreed production plan. Do not tell the designer to delete a blank just to get the old count back: that blank may control where a chapter or paired image lands. Ask for the proposed new sequence and total.
If the revised proof contains 34 pages, update the expected count from 32 to 34 in the approval record. A photograph formerly on PDF17 could now be on PDF18; your original correction log remains tied to v02, while a new column records its v03 location. The old page-offset shortcut should be checked again, not assumed to survive every section change.
Review the correction, its neighbors and the complete book
- Open the newly delivered proof and read its filename and page count. Confirm that it is v03 rather than a cached v02 preview.
- Resolve C01 by checking the complete caption against the supplied evidence. Record “verified in v03, PDF18” only after seeing it.
- Read the paragraph before C02, the inserted passage and the continuation. Look for repeated or dropped text at both joins.
- Review the newly affected facing-page pairs. In this left-to-right example, with PDF1 on the right, facing pairs are PDF2–3, 4–5 and so on. Check that your viewer’s cover-page setting matches that assumption.
- Recheck the contents, cross-references, page numbers and final page. An unchanged cover may still need a new spine assessment if the interior changed.
- Perform the complete reader and production passes above. Close each issue separately; a change marked “done” by the designer is still awaiting your verification.
A home printout can help with reading size and page pairing. Print at actual size and check a known measurement with a ruler. It remains a layout aid: a home printer and office paper do not validate the production stock, color or binding.
Optional: compare the PDF versions in Acrobat Pro
Adobe’s current Compare Files instructions describe opening All tools → Compare files, selecting the old and new versions, and generating a comparison report. For an illustrated book, do not select text-only comparison when you also need image changes. Review the report filters: Adobe notes that formatting, background and annotation differences are hidden by default. Save the report with the proof versions.
This is an optional aid, not a requirement to buy software. Without it, keep old and new PDFs side by side and work through your issue log. Neither method can decide whether the inserted passage is truthful, whether a chapter now makes sense or whether a face is comfortably clear of the physical binding.
Send an approval that identifies what you actually reviewed
Replace every bracketed field in this template. It is a communication example, not a release of your legal rights or a guarantee of physical results.
I have reviewed interior [exact filename], [total PDF pages], and cover [exact filename], received [date]. The agreed specification is [trim size, paper identifier, binding and quantity]. Issues [IDs] are verified in this revision. The intended blank pages are [PDF page numbers]. My unresolved questions are [list, or “none”]. Please use only these confirmed files and obtain a new approval if content or the production specification changes.
If a critical question remains, send “Please hold production pending clarification of [issue]” instead of “Approved, but…”. Do not use the template to approve material choices you have not tested. State separately whether you have reviewed a physical sample or only the electronic proof.
Keep a small approval folder
Save the exact final interior, final cover, issue log, approval message and agreed specification together. Preserve the previous version in a clearly marked superseded folder rather than leaving two files both called “final.” For a later reprint, this becomes the starting reference; see our book-file archive workflow.
This workshop is an original hypothetical example. It does not describe a customer order or claim that a software comparison catches every error.
What a digital proof cannot confirm
A digital proof is a screen representation. It cannot let you feel the paper, test how far the binding opens, judge the book’s weight, or see the final trimming variation in your hand.
Color also needs restraint. Adobe explains that an accurately calibrated monitor and suitable profiles can make an on-screen preview closer to the intended separation output, but the preview still cannot verify every press condition. Lulu likewise notes that screen and print color can differ and recommends a proof copy before a large order or public release.
IngramSpark recommends ordering a print copy after eproof approval and before direct orders or distribution. Its user guide also says the eproof is rasterized and that exceptionally large eproof files can omit middle pages with a watermark. These are IngramSpark-specific conditions, not rules for every digital proof.
Use the digital proof to approve prepared content and placement. Use a physical copy when the decision depends on paper, color, binding, trim, finish, or how the object feels in use.
Digital book proof approval checklist
- Confirm the proof version matches the file you intended to submit.
- Compare title, author name, subtitle, and front matter.
- Read every line from the first page to the last.
- Check page order, intentional blanks, and left-right pairings.
- Review every spread and page turn.
- Inspect size, orientation, trim, bleed, margins, and gutter.
- Zoom in on images, fonts, symbols, and thin lines.
- Check the separate cover, spine, wrap, and barcode area.
- Consolidate corrections into one page-specific list.
- Review the revised proof from page one before approving.
- Reserve paper, physical color, binding, and trim judgments for a printed copy.
YourBookBound begins with a free human file check. If you continue, the single $99 USD service includes technical file corrections, interior layout preparation, cover design or adjustment and spine setup, a digital proof and revisions before approval, one finished hardcover and standard tracked shipping. Read How It Works, check accepted files in the File Guide, and review everything included for $99.
File finished, proof still ahead
Start with the complete interior.
Send the file for a free human initial check. No payment is required at upload, and there is no obligation to order.