> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.recitalapp.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# How to Open a Document Comparison from Email

${frame}[ ](https://share.descript.com/embed/UjU07JNTQLv)

## How it Works
Once you have [installed the add-on](/en/article/how-to-install-the-recital-email-add-in-1rzd58c/), simply open any email containing a Word or PDF attachment that you would like to compare to a previous version, then open the Recital add-on and click the **Compare** button. 

Your web browser will open a new tab taking you directly to the *Compare* page in Recital. If the email contains multiple attachments, Recital will prompt you to select the attachment you would like to compare. Recital will assign the attachment as the *Revised* version of the contract, and if a previous version of the document is detected in Recital, it will also suggest the most recent version to compare against as the *Original*. From there, you can begin your comparison.

## Security

When the Recital button is clicked, the Outlook Add-in only accesses the ID of the currently-selected email. It then opens a web browser with that email ID in the URL. No other data is accessed or sent.

The Recital for Gmail Add-in itself does not access or send your data. It adds a button to your email that opens a link in the Recital web application with an identifier for the selected email; the Recital application then fetches the information about that email attachment.