If you want to tween an object from one shape into
another, you can use simple shape tweening instead of motion tweening.
With shape tweening, you do not make your objects
a symbol.
To use text, the text must be first broken apart
(Modify-->Break Apart)
STEP ONE:
Draw a blue square on the stage with the
square tool. It will automatically be inserted into a keyframe
on Frame 1 Layer 1
STEP TWO:
Insert a blank key frame further down in the timeline.
Here I clicked on Frame 15 and then went to Insert-->Blank
Keyframe (or just click F7)
A blank keyframe will not duplicate the content
of the previous keyframe.
STEP THREE:
Now draw a new shape in this second keyframe--make
it a red square.
Do not make either shape a symbol!
STEP FOUR:
Create the shape tween.
Put your cursor in between the 2 keyframes
until it turns into a hand and then left click
Go to Modify-->Frame or click CTRL-F to bring
up the Frames Panel and under Tweening choose Shape
If your shape tween was succesful, the frames
will be light green.
To Use Text in a Shape
Tween:
In order to use text in a shape tween, you must
break apart the text block. Do this by typing your text and
then going to Modify-->Break Apart. This will convert the
text from an editable text block to a pure shape.