Map the original range to the replacement source precisely, because Acrobat can preserve interactive elements while the visible text and images beneath them change
Use a document-purpose–target-PDF–source-PDF–original-physical-range–original-label–replacement-start–equal-page-count–visible-content–link–bookmark–form–tag–signature–page-count–navigation-test–release chain. Read Original and Replacement as two different coordinate systems.
Why this English matters now
Reading Acrobat’s Replace Pages ranges before updating a PDF is practical English for students, researchers and document teams searching how to replace one page in a PDF, update several pages without rebuilding the file or preserve PDF links and bookmarks.
Adobe’s current guidance says Acrobat can replace one or more pages with pages from another PDF. The Replace Pages dialog distinguishes the Original range in the target from the first Replacement page in the source, calculates the ending replacement page from the number being replaced, and preserves interactive elements such as links and bookmarks while replacing the original pages’ text and images.
Preserving a bookmark can be useful—or dangerous—if it now points to content with a different meaning. Strong reviewers preserve both PDFs, identify physical pages and labels, map equal-length ranges, inspect visible content and interactive elements, check tags, forms and signatures, compare page count and navigation, save to a derivative, and verify the exact updated PDF before release.
Checked against the linked first-party sources on 30 October 2026. Interfaces, managed-device rules and school procedures can change, so reopen the current source before a live assessment, disclosure or account decision.
The practical reading method
Use a document-purpose–target-PDF–source-PDF–original-physical-range–original-label–replacement-start–equal-page-count–visible-content–link–bookmark–form–tag–signature–page-count–navigation-test–release chain. Read Original and Replacement as two different coordinate systems.
- Adobe says Replace Pages can replace one or more target pages with pages from another PDF.
- Adobe says Original identifies the pages to replace in the current PDF, while Replacement identifies the source range beginning page.
- Adobe says the number of replacement pages follows the number of original pages being replaced.
- Adobe says text and images are replaced while interactive elements such as links and bookmarks are preserved.
Official factual floor
- Adobe Acrobat: Replace pages in PDFs
- Adobe Acrobat: Organize PDF pages
- MOE English Language Syllabus 2020
- IMDA Digital Skills for Life
- Adobe says target pages can be replaced by an equal number of pages from another PDF.
- Adobe says the dialog separates the Original target range from the Replacement source starting page.
- Adobe says visible text and images are replaced while links and bookmarks on the original pages are preserved.
Did You Know?
Replace Pages can keep the target PDF’s links and bookmarks even though the page’s visible text and images come from another file. That means the navigation may survive technically while becoming wrong in meaning—one of the clearest examples of why English review matters after a successful software operation.
Full chapter index
- 1. Define the update purpose
- 2. Preserve target and source PDFs
- 3. Separate physical positions and page labels
- 4. Read Original as the target range
- 5. Read Replacement as the source start
- 6. Prove equal-length mapping
- 7. Check page size, rotation and crop
- 8. Inspect retained links
- 9. Inspect retained bookmarks
- 10. Check forms, comments and annotations
- 11. Check tags and accessibility
- 12. Check signatures and records status
- 13. Verify the exact updated PDF
The mechanism
Replacement should answer a precise authorised correction or revision.
Adobe says Replace Pages can replace one or more target pages with pages from another PDF. In this chapter, the decisive phrase is define the update purpose. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A newer-looking page is inserted without confirming that it is the approved version.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. state the reason
- 2. name the authority
- 3. identify affected readers
- 4. define acceptance evidence
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Purpose language supports document control. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Both files are evidence for the change and must remain recoverable.
Adobe says Original identifies the pages to replace in the current PDF, while Replacement identifies the source range beginning page. In this chapter, the decisive phrase is preserve target and source pdfs. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: The target PDF is overwritten before the source range is verified.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. store originals read-only
- 2. record file identities
- 3. create a derivative
- 4. protect confidential material
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Provenance language supports accountability. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Dialog ranges normally refer to physical page positions, not necessarily printed labels.
Adobe says the number of replacement pages follows the number of original pages being replaced. In this chapter, the decisive phrase is separate physical positions and page labels. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A page labelled 1 is physical page 5 after front matter.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. record target positions
- 2. record visible labels
- 3. record source positions
- 4. publish the mapping
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Identity language supports accurate range selection. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Original identifies pages in the PDF being updated.
Adobe says text and images are replaced while interactive elements such as links and bookmarks are preserved. In this chapter, the decisive phrase is read original as the target range. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: Pages 12–14 are entered from the source when the dialog expects the target range.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. name the target file
- 2. enter start and end
- 3. check thumbnail context
- 4. confirm page count
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Target language supports controlled editing. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Replacement begins at a chosen source page and follows the target range length.
Adobe says Replace Pages can replace one or more target pages with pages from another PDF. In this chapter, the decisive phrase is read replacement as the source start. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: The source start is correct but the expected end crosses into another appendix.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. name the source file
- 2. enter the first source page
- 3. calculate expected end
- 4. inspect every source thumbnail
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Source language supports accurate mapping. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
The replacement count should match the number of target pages being replaced.
Adobe says Original identifies the pages to replace in the current PDF, while Replacement identifies the source range beginning page. In this chapter, the decisive phrase is prove equal-length mapping. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: Three target pages receive a source sequence beginning one page too early.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. count target pages
- 2. count expected source pages
- 3. write the mapping
- 4. review before confirming
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Count language supports reliable updates. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Replacement content can differ in geometry from neighbouring pages.
Adobe says the number of replacement pages follows the number of original pages being replaced. In this chapter, the decisive phrase is check page size, rotation and crop. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A landscape replacement appears rotated and cropped in a portrait report.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. compare media and crop boxes
- 2. compare rotation
- 3. preview transitions
- 4. repair the source when possible
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Geometry language supports stable documents. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Adobe says links can be preserved from the target page.
Adobe says text and images are replaced while interactive elements such as links and bookmarks are preserved. In this chapter, the decisive phrase is inspect retained links. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A retained button labelled ‘Next section’ now jumps to the wrong topic.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. inventory links before replacement
- 2. test every changed-page link
- 3. read visible anchor text
- 4. repair destinations with authority
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Link language supports useful navigation. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Bookmarks may remain while visible headings change.
Adobe says Replace Pages can replace one or more target pages with pages from another PDF. In this chapter, the decisive phrase is inspect retained bookmarks. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A bookmark says Methods but the new page contains Results.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. expand the bookmark tree
- 2. test changed destinations
- 3. compare titles with headings
- 4. update names when authorised
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Navigation language supports trustworthy references. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Interactive or review elements may persist, disappear or misalign.
Adobe says Original identifies the pages to replace in the current PDF, while Replacement identifies the source range beginning page. In this chapter, the decisive phrase is check forms, comments and annotations. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A comment now points to unrelated text on the replacement page.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. inventory fields and comments
- 2. inspect coordinates
- 3. test actions
- 4. remove stale elements only with evidence
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Annotation language supports accurate review. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
Editing a signed PDF can change signature validity or record status.
Adobe says text and images are replaced while interactive elements such as links and bookmarks are preserved. In this chapter, the decisive phrase is check signatures and records status. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: A signed report is updated without preserving the signed original or noting the revision.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. inspect signatures before
- 2. follow the organisation’s policy
- 3. record the derivative
- 4. inspect signature status after
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Authority language supports responsible records. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
The mechanism
The target, source, derivative and uploaded record are distinct artefacts.
Adobe says Replace Pages can replace one or more target pages with pages from another PDF. In this chapter, the decisive phrase is verify the exact updated pdf. It identifies the state or boundary to check before a click, upload, disclosure or connection turns an assumption into a real consequence.
A practical school or study situation
Example: The replacement is correct locally but an earlier PDF is distributed.
Replace Pages changes visible page content while attempting to preserve target-document interactive elements. It does not prove the source is correct, the range mapping is intended, retained links and bookmarks still describe the new content, accessibility survives or signatures remain valid.
- 1. save close and reopen
- 2. check changed and boundary pages
- 3. open the actual upload
- 4. retain a release record
Preserve the target and source PDFs; record file identities and authority; inventory physical positions, page labels and counts; map the Original target range to the Replacement source start and expected end; compare orientation, size and crop boxes; replace in a derivative; inspect every changed page; test retained links, bookmarks, form fields, comments, tags and reading order; inspect signature status; compare total page count and surrounding transitions; save, close, reopen and verify the exact released PDF and upload. Then name the remaining uncertainty. A successful click is evidence about one operation at one time; it is not an unlimited promise about safety, authorship, privacy, delivery or future behaviour.
Build a reproducible note
Record target PDF, source PDF, purpose, authority, hashes where appropriate, target physical range and labels, source start and end, expected page count, orientations and sizes, retained links and bookmarks, forms, comments, tags, reading order, signature status, transition checks, reviewer and final file identity.
Transfer: Release language supports study and work. The transferable habit is to preserve exact nouns and verbs, match them to authority and test the resulting state. That is a career skill as much as an English skill.
Four useful discoveries
Define the update purpose
Replacement should answer a precise authorised correction or revision.
Boundary: A technically newer page may still be incorrect.
Preserve target and source PDFs
Both files are evidence for the change and must remain recoverable.
Boundary: Copies can still contain signatures or links requiring review.
Separate physical positions and page labels
Dialog ranges normally refer to physical page positions, not necessarily printed labels.
Boundary: Labels can repeat or use Roman numerals.
Read Original as the target range
Original identifies pages in the PDF being updated.
Boundary: A correct range can still be the wrong approved section.
Practice with realistic decisions
Read Replacement as the source start
The source start is correct but the expected end crosses into another appendix.
- name the source file
- enter the first source page
- calculate expected end
- inspect every source thumbnail
Prove equal-length mapping
Three target pages receive a source sequence beginning one page too early.
- count target pages
- count expected source pages
- write the mapping
- review before confirming
Check page size, rotation and crop
A landscape replacement appears rotated and cropped in a portrait report.
- compare media and crop boxes
- compare rotation
- preview transitions
- repair the source when possible
Advice for students, families and educators
For students
- Write the target and source range mapping before pressing Replace.
- Test bookmarks and links on every replaced page.
For families
- Keep originals safe and avoid replacing pages in signed or sensitive documents without authority.
- Help compare visible headings and navigation after the change.
For educators
- Teach target physical pages and source physical pages as separate coordinate systems.
- Assess navigation, accessibility and provenance as well as visual replacement.
Frequently asked questions
What does Replace Pages do?
Substitutes target pages with an equal number of pages from another PDF.
What does Original mean?
The physical range in the PDF being updated.
What does Replacement mean?
The starting source page in the replacement PDF.
How is the replacement end chosen?
Acrobat calculates it from the number of target pages being replaced.
Do links remain?
Adobe says links on the original pages are preserved.
Do bookmarks remain?
Adobe says bookmarks are preserved.
Does preservation prove they are still correct?
No; test their meaning and destinations.
Can signatures be affected?
Yes, editing a signed PDF can affect signature status.
What should I verify?
Ranges, content, geometry, links, bookmarks, annotations, tags, signatures and exact output.
Why English?
Because Original, Replacement, physical page, page label, link, bookmark and visible content describe different structures.
Useful next reading
- Acrobat Page Number and Date Format — reconcile visible numbering after a structural update
- PDF Page Labels — distinguish physical positions from viewer labels
- Why English Matters in Singapore — connect precise document control to education and careers
Closing thought
A page replacement is successful only when the new content, old navigation and final document still tell the same truthful story. Map both ranges, test what Acrobat preserves and verify the exact derivative before it becomes the record everyone uses.