How to Set New Messages to Open in a New Window in Outlook by Default

How to Set New Messages to Open in a New Window in Outlook by Default

In the new Outlook, clicking New to compose a message opens it in a side panel rather than a separate window. If you find yourself constantly clicking "Open in New Window," there is a setting to make pop-out the default.

Outlook compose panel showing the Open in New Window button
By default, new messages open in the side panel — notice the "Open in new window" button at the top right

Change the Default to Pop-Out

Go to SettingsMailCompose and Reply. Under Pop-out settings, select Pop-out to a new window, then click Save.

Outlook Settings showing Compose and Reply with Pop-out settings options
Under Pop-out settings, switch from "Write inline" to "Pop-out to a new window"

Now every new message, reply, or forward will automatically open in its own window.

New Outlook message opened in a separate pop-out window
After saving the setting, clicking New opens the compose window separately

Quick Tip

Can't find the setting? Open Settings and type "Pop" in the search box. It takes you straight to Pop-out settings — sometimes even easier than navigating the menus.

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