Position Ranges mode allows you to position range bars independently from their associated keys and produce special effects.
The process of adjusting a range bar independent of its keys is called decoupling the range. Positioning a range bar so it matches the first to last keys of a track is called recoupling the range.
You decouple a range bar for two reasons:
Keys outside of the range bar are ignored during animation playback. The keys outside the range still affect interpolated values inside the range, but the applied Out-of-Range type is used to animate time outside the range bar.
Time beyond the first or last key of the track, but still within the range, uses the constant value of the nearest key within the range.
To decouple a range bar from its keys:
Using Out-of-Range types in conjunction with this procedure allows you to change the behavior of an animated loop. Positioning either end of a range bar changes the loop.