use the interface
An interface refers to the elements you interact with while using a program: menus, buttons, icons, controls, dialog boxes, and so on. Many of these elements will already be familiar to you from having used other Windows applications.Whenever you launch Picasa, you'll first see the Picture Library (or Library). The important parts of the Picture Library interface are numbered in the screen shot below. Refer to the following pages for explanations of the parts.