49. The method of claim 48 , further comprising, after scaling the values, modifying at least one value for one frame in the group, and in response automatically modifying that value in the other frames in the group.
49. The method of claim 48 , further comprising, after scaling the values, modifying at least one value for one frame in the group, and in response automatically modifying that value in the other frames in the group. 50. The method of claim 49 , wherein modifying that value in the other frames in the group occurs by scaling those values in accordance with a second scaling factor as determined by the modified at least one value for the one frame.