The Buyer menu is where you can manage and keep track of your buyers. Through this menu you can create and save buyer information for use with any of your scheduled appointments. Once a buyer has been added you can then manage any showings scheduled with that buyer as well as keep track of your other buyer's showings.
When scheduling a showing, you will then be able to select an existing buyer you've used in the past in this menu or create a new one for this showing appointment. From the Showing Clipboard you can then view any showings that you have scheduled for that specific buyer or a combined list of showings that are scheduled for all of your buyers.