## Documentation Index

Access the complete documentation index at:
https://www.zoho.com/om/books/kb/llms.txt

Use this file to discover all available documentation pages before proceeding.

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# How do I prevent others from editing the PDF files sent from Zoho Books?

Zoho Books allows you to encrypt all the PDF files sent from your organisation. Enabling this option prevents your customers from editing or converting the document into other file formats.

To enable this option:

*   Go to **Settings**.
*   Select **General** under _Preferences_.
*   Check the “**I would like to encrypt the PDF files that I send.**” option.

![Encrypt PDF](/books/kb/images/general/pdf-encrypt.png)

*   Click **Save** at the bottom of the page.

All the PDF files sent henceforth will be encrypted.