constant segments: A sequential pair of keyframes used to key the same type of attributes creates a segment. For example a beginning rotational keyframe and the next rotational key frame sequentially located on the same element peg are connected by a segment. The length of the segment depends on the number of in between frames. The purpose of a connecting segment is to define the method of "tweening" for the in between frames between the two keys. If there is to essentially be no in between changes between the two keys, that is to say we want to hold the first key constant until we reach the next key, then the segment is a constant segment. Constant segments are used when we as animators want to have a "snap" or "jump" between keys.

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