20. The method of claim 19 , further comprising, after applying the optimized at least one value, 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.
20. The method of claim 19 , further comprising, after applying the optimized at least one value, 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. 21. The method of claim 20 , wherein modifying that value in the other frames in the group occurs by scaling those values in accordance with a scaling factor as determined by the modified at least one value for the one frame.