Using the Pushpin in the View Message Window

The View Message window has a pushpin that you can use to pin the window to the workspace if you want to keep a message (or several messages) visible.

If you do not pin the View Message window, it is reused for subsequent mail messages that you view. If you do pin the View Message window, a new View Message window will be displayed for the next message you view, and you can display multiple View Message windows at the same time.