The Inspector Pane neatly summarizes content detected within messages and conversations and provides a set of actions to help you intuitively use this content.
Open or close the Inspector Pane by going to View > Show > Inspector Pane (Shift + Command + I)
The Inspector Pane will first summarize any known information about the sender, including profile picture, name, title, and company.
Content detected within the message body will display below the sender's information. Right-click an item to display a set of actions that can be performed on the content. Some content elements, such as attachment and images, can be dragged and dropped to the desktop or into new messages.