To save an email as a PDF: On a computer (Windows or macOS):

1. Open the email you want to save.
2. Click the Print option (usually found in the top right or in the menu).
3. In the print dialog, choose "Save as PDF" or "Microsoft Print to PDF" as the printer/destination.
4. Click Save and choose where to store the PDF file.

On Gmail (web version):

• Open the email, click Print, then choose "Save as PDF" and save.

On Microsoft Outlook (web or desktop version):

• Open the email, select Print, choose "Save as PDF" or "Microsoft Print to PDF," and save the file.

On mobile devices (Android or iOS):

• Open the email.
• Use the menu or More options to find Print.
• Choose "Save as PDF" as the printer/destination and save.

This method works similarly across email platforms like Gmail, Outlook, iCloud Mail, and Yahoo Mail, with slight variations in menu names, but the key step is selecting the print option and then "Save as PDF".