Elements copied to the clipboard are anti-aliased, so they look as good in other applications as they do in Flash. This feature is particularly useful for frames that include a bitmap image, gradients, transparency, or a mask layer.
Graphics pasted from other Flash documents or programs are placed in the current frame of the current layer. How a graphic element is pasted into a Flash scene depends on the type of element it is, its source, and the preferences you have set:
Text from a text editor becomes a single text object.
Vector-based graphics from any drawing program become a group that can be ungrouped and edited.
Bitmaps become a single grouped object just like imported bitmaps. You can break apart pasted bitmaps or convert pasted bitmaps to vector graphics.