Clarification about Shapes and Drawing objects

The default drawing mode automatically merges shapes that you draw when you overlap them. When you draw shapes that overlap each other in the same layer, the top-most shape cuts away the part of the shape underneath it that it overlaps. In this way, drawing shapes is a destructive drawing mode. For example, if you draw a circle and overlay a smaller circle on top of it, and then select the smaller circle and move it, the portion of the second circle that overlaid the first circle is removed.Creates shapes referred to as drawing objects. Drawing objects are separate graphic objects that do not automatically merge together when overlaid. This lets you overlap shapes without altering their appearance if you move them apart, or rearrange their appearance. Flash creates each shape as a separate object that you can individually manipulate.

When a drawing tool is in Object Drawing mode, the shapes you create with it are self-contained. The stroke and fill of a shape are not separate elements, and shapes that overlap do not alter one another. When you select a shape created using Object Drawing mode, Flash surrounds the shape with a rectangular bounding box to identify it.