How to Create Chapters and Nested Sub-Bookmarks in PDF Files
Question details
The user wants to organize a PDF document by creating chapters and nested sub-bookmarks for easier navigation.

- Product
- Device & OS
- not provided
- Scenario
- Organizing a long PDF document with a clear hierarchical navigation structure.
- Observed behavior
- The user needs to establish a parent-child bookmark hierarchy or generate bookmarks automatically from existing document heading tags.
Ensure you have a PDF editing tool installed and open the PDF document you wish to organize. If you plan to generate bookmarks automatically, check if your PDF retains heading tags (like H1 or H2) from its original source.
Manually Create Nested Sub-Bookmarks via Drag and Drop
Create a parent-child hierarchy by manually dragging existing bookmarks under their designated chapter headings.
Open your PDF editor and navigate to the bookmark panel, which is usually located on the left sidebar of the application.
Navigate to the specific page or text section, and add a new regular bookmark for the section you want to use as a sub-bookmark.
Click and hold the newly created bookmark, then drag it directly below the parent bookmark (the main chapter) you want it nested under.
Wait until the dotted insertion line moves slightly to the right, indicating a nested child position, and release your mouse button.

Generate Bookmarks Automatically from Document Structure
Use the document's existing heading tags (H1, H2, etc.) to automatically build a structured chapter and sub-bookmark list.
Easily Organize PDF Chapters and Bookmarks with WPS Office
WPS Office provides powerful PDF editing features, allowing you to quickly add, nest, and manage bookmarks to create structured chapters. Organize your lengthy documents effortlessly with an intuitive interface.
- 1. Open PDF in WPS Office: Launch WPS Office and open your target PDF file.
- 2. Access the Bookmark Pane: Click the Bookmark icon on the left navigation pane to view or edit existing bookmarks.
- 3. Add New Bookmarks: Navigate to the desired page, click the '+' icon in the bookmark pane, and type a name for your new bookmark.
- 4. Create Sub-bookmarks: Click and drag a bookmark slightly to the right under another parent bookmark to instantly nest it as a sub-chapter.

Frequently Asked Questions
Can I demote a parent bookmark to a sub-bookmark?
Yes, you can easily change the hierarchical level of any bookmark. Simply click and drag the bookmark slightly to the right underneath the desired parent bookmark until the indicator line shifts right, then release it.
Why can't I generate bookmarks from my document headings automatically?
Automatic generation requires the PDF to be correctly 'tagged' with structural elements like H1 or H2 during the export process from the original software (e.g., Microsoft Word). If the PDF was flattened, printed to PDF, or created without accessibility tags, you will need to create and nest the bookmarks manually.
Is there a limit to how many sub-bookmark levels I can create in a PDF?
Most professional PDF editors, including WPS Office, allow multiple levels of nested bookmarks. However, for the best user experience and clear navigation, it is highly recommended to keep your hierarchies to 3 or 4 levels deep.




