The symbols type Graphic are static images to create animation and it can be reused.
Video Tutorial:
Creating a Graphic symbol:
A "Graphic" type symbol can contain text, image that can be converted into a single object. The above video teaches you how to create symbols of type "graphic" for image animation.
Simply draw an rectangle in a new layer.
In another layer use the "text tool" to type in the text.
Keyframes are selected using the "shift" key and are copied.
Use either "F8" key or click "Insert" and then "Create New Symbol" to create a graphic symbol which will be added to the library.
Paste the copied keyframes in the "Newly created Symbol" Screen.
click on the stage Button to delete the previous two layers.
To make any changes to the symbol, drag it on to the stage, double click on it to edit the text or to disable layers.