Outlook -- Opening an Email in a Separate Window in Online Outlook

Recommended Option:

There is a simple way to open an email in a separate window when using the online version of Outlook for Office 365 that you use in an internet browser.

Double-click the email in the "Inbox" panel. That's it.

Double-clicking the email in the "Inbox" panel will make that email open in a new window in your internet browser.

Email in Inbox folder panel in online Outlook Office 365.png

If you are in a different folder than your "Inbox," you'll double-click the email in the same panel. But the panel will show the name of the folder.


Double-clicking the email in the panel showing emails in whatever email folder you are viewing will make that email open in a new window in your internet browser.

Email in folder panel in online Outlook Office 365.png

There are at least two other methods, however, as well, described below.

Alternate Option 1 -- If Already Replying in Left Reading Pane:

If you are already replying to an email in the far-right "Reading Panel," click the double arrows icon in the "To" row of the message.

double arrow expand icon when replying to email in Reading Pane in online Outlook Office 365.png

Then click the overlapping squares icon, or pop-out icon, in the upper right.

Pop-up window icon when replying to email in Reading Pane in online Office 365.png

Alternate Option 2 -- Before Replying in Left Reading Pane:

You can also click the tiny down arrow or  next to "Reply All" or "Reply" in the right Reading Pane.

Then click "Open in a separate window."

Open in a separate window option for email in Reading Pane in online Outlook Office 365.png