Bitmaps
Image as a symbol
If you select an image and hit F8 you may transform it to the Graphic Symbol as a drawing.
After that it’s possible to use it as any symbol – for example to animate it with Motion Tweening.
Place your image in separate layer, add more keyframes, insert motion tweening and change symbol properties in one of the keyframes.
In our example we have changed transparency (Alpha) to make the image appear gradually.
Click on the example below to see the effect