# Multi-page PDFs and large invoices

Handle multi-page PDFs and reprocess selected page ranges.

Bundled PDFs (cover letters, terms, multiple invoices in one scan) are common. Cortena shows page navigation in the viewer and lets you **reprocess** only the pages that contain the real invoice when extraction picked up the wrong section.

**Who this is for:** AP clerks working with long scans, email attachments with extra pages, or warehouse bundles where only pages 2-3 are the invoice.

## 1. Recognise multi-page documents

When the attachment has more than one page, the invoice viewer shows a **page indicator** (current page / total pages). Scroll or use viewer controls to confirm which pages hold totals, line items, and supplier details.

Large files behave the same way. The issue is usually **wrong page selection**, not file size alone.

## 2. Fix extraction with page-range reprocess

If line items or totals clearly came from a cover page or the wrong annex:

1. Open the invoice in **Payables** or **Expenses**.
2. Header **⋯** menu → **Reprocess invoice**.
3. For multi-page **scanned PDFs**, choose a preset or **custom range** (for example pages **3-4** only).
4. Confirm. Cortena re-runs extraction on those pages and updates stored invoice fields.

Full-document reprocess (all pages) remains available when the invoice truly spans the entire PDF.

**Detailed steps:** [Reprocess](https://help.cortena.ai/guides/invoices/reprocess).

## 3. After reprocess

Check **Activity** on the invoice. It records which page range was reprocessed. Re-verify booking match, totals, and **Document type** after a range run.

Keyboard shortcut **Ctrl/Cmd+R** may trigger full reprocess with confirmation. Prefer the menu when you need a **subset** of pages.

## 4. When page-range does not apply

**Structured e-invoices** (embedded XML such as ZUGFeRD or standalone UBL) read data from the XML. Slicing the PDF pages does not change extracted business fields. For those, fix source data or supplier format instead of page-range reprocess.

See [E-invoices](https://help.cortena.ai/guides/invoices/e-invoices) and FAQ **Can I reprocess pages on an e-invoice?**.

## Tips and limitations

- Page-range reprocess replaces extracted content for the chosen pages. Review match and cost centers afterward.
- Very poor scan quality may need a better source PDF from the supplier, not repeated reprocess.
- Duplicates and reference numbers may change after reprocess. Re-check duplicate scope on the list.

## Quick reference

| **Task** | **Where** |
| --- | --- |
| Inspect pages | Invoice PDF viewer page control |
| Reprocess subset | **⋯** → **Reprocess invoice** → page range |
| Full reprocess | Same menu → all pages (or Ctrl/Cmd+R where enabled) |
| Full guide | [Reprocess](https://help.cortena.ai/guides/invoices/reprocess) |
| E-invoice | No page-range · see [E-invoices](https://help.cortena.ai/guides/invoices/e-invoices) |