In Step 3, the display changes again, and we now select the number of
frames that we want the Animation
Assistant to create between the 1st
and 2nd Key Frames that were already created.

In this example, we have chosen
to add 8 additional frames, so we entered the number 8 into the window (as
shown below), and clicked Ok.
Now we can click the Next Button
to continue to Step 4