Bookmark
PDF Bookmark
A navigational element in a PDF outline that links to a specific location within the document.
Technical Detail
In the PDF specification (ISO 32000-2:2020), bookmark is implemented as a specialized object within the document's object graph. PDF files use a cross-reference table to index every object by byte offset, enabling random access without sequential parsing. This architecture allows bookmark to be read, modified, or extracted independently of other document elements. The binary structure supports incremental saves, where changes append to the file without rewriting existing content.
Example
```javascript
// Bookmark: PDF manipulation example
import { PDFDocument } from 'pdf-lib';
const pdfDoc = await PDFDocument.load(fileBytes);
const pages = pdfDoc.getPages();
console.log(`Pages: ${pages.length}`);
```
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AcroForm
Annotation
Bates Numbering
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Content Stream
Cross-Reference Table
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