Your annual report has a deep bookmark tree — sections, subsections, sub-subsections. You need to split out the financials section as a standalone file. The split tool you tried just gave you a flat PDF with no outline.
Flint keeps the relevant bookmark subtree with each split.
What 'relevant' means
When you split out pages 67-110 (the financials section), Flint extracts every bookmark whose target page falls within 67-110 and rebases them to the new page numbers (so the bookmark for page 67 now points at page 1 of the output). Bookmarks outside the range are dropped — they'd be broken anyway.
Nested bookmarks come along
If your financials section has subsection bookmarks ('Balance Sheet', 'Income Statement', 'Cash Flow'), those nested entries are preserved in the split. Open the standalone financials file and the reader's outline sidebar shows the same hierarchy you had in the original.
How to trigger this in Flint
Use split PDF with any method (range, bookmark, size). Bookmark preservation is the default — there's no toggle to remember. Output files automatically include the relevant outlines.
When bookmarks are essential downstream
Long technical documents, contracts with cross-references, books, legal filings — anywhere the recipient will navigate the file. Sending a flat PDF with no outline forces them to scroll. Preserving bookmarks respects their time.
FAQ
Can I edit bookmarks after splitting?
Yes. Edit PDF lets you rename, reorder, or remove entries in the output file.
Do internal hyperlinks survive?
Within-range internal links are preserved and remapped. Cross-range links can't be (the target isn't in the output).
What about named destinations?
Named destinations within the range survive. Outside-range names are dropped.
Does the bookmark tree look exactly like the original subset?
Yes — same hierarchy, just renumbered.
Outlines survive the split. Split keeping bookmarks.