In this article, we'll explain how to open a Gmail message in its own window, without the distraction of the Gmail interface.
How to Open an Email in a New Window in Gmail – 3 Different Ways
To open a Gmail message in a separate browser window, hold down the Shift key while selecting the message. You can arrange the windows and view them simultaneously.
If you're using Conversation View, you'll see the entire conversation in the new window. If you want to see just one message and not an entire conversation, use the instructions below to turn off Conversation View or use Print Layout.
You can open as many messages in new windows or tabs as your browser allows. You can continue to read the emails even after you delete them from your Inbox or archive them there.