Most of the fields in the Databook Item window have menus available for editing. These menus are accessed with a secondary mouse click in the field itself.
The same menu selections are not available for every field (e.g., some include Cut, Copy, Paste, etc. while others only have the New selection). These menus allow you to make changes and add new selections to a drop-down quickly right here in this window. When you select New or Edit, the appropriate window displays for the selected field.