You can download an EML file by clicking View original in the message action menu:
Hover over the message you want to print
Click the ... menu that appears to the right of the sender's name
Select View original from the message action menu:
Click Download raw email file in the bottom right corner:
Guides
The Shortwave Method
Shortwave AI Assistant
Migrating from Gmail
Compose & send
Bundles
Smart Labels
Shortwave for teams
Billing
Security
How-tos
Download desktop
Default email app
Enable push notifications
Troubleshoot push notifications
Manage multiple accounts
Sync Gmail settings
Integrate Shortwave with your CRM
Troubleshoot missing threads
Print a message
Download EML file
Google Advanced Protection
Import full history
Downgrade account
Delete account