Use the Backspace key to file a message.The Archive button creates a simple workflow: Hit Backspace, a message is moved to the Archive folder. It’s a one-click option to clear mail from the Inbox without deleting it. The Archive button moves an email message to a folder named “Archive.” That’s it. Some of you may decide it’s your new best friend. The Archive button appeared a couple of years ago without any fanfare and, I’ll be damned, it’s pretty useful. You haven’t noticed it because we have trained ourselves for twenty years to let our eyes slide over anything in Outlook that we don’t use. Outlook has an Archive button, right next to the Delete button.