Thurrott has revealed that the newest version of the Mail application for Windows 10 includes the message pop-out feature. The button will allow users to create separate windows to view multiple e-mails at once.
The full software will be made public during the upcoming Microsoft Build event from March 30 to April 1, which will showcase the latest of what Microsoft has to offer.
While previous versions of Mail included the feature, it has been absent from recent updates. This feature can currently be used through the Calendar app.
The release date of the update is unknown.