When you create pictures, you can add a variety of objects, such as charts, text, and bitmaps, or geometric shapes, such as rectangles, polygons, and ovals. Each object contains properties – specific attributes assigned to the object that make it unique.
Properties make objects either visible or invisible. Visible objects are those that contain properties you can see, such as a color or style fill. These are attributes that you can control in several ways. Invisible objects, also called animation objects, are those that are added to objects during animation, such as rotation, and scaling. When you animate an object, invisible objects are added to your pictures automatically, without your control, and displayed in the system tree. Both visible and invisible properties can be modified using either the Properties window or the Animations dialog box.
NOTE: Read-only properties cannot be modified directly. For example, to change the bottom edge of a rectangle (a read-only property), you would have to change the rectangle's height property to affect the edge property.
