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With this phase, you can impose hand animation onto the distance between a moving object and it's camera. Your main tools are the distance value and a 0..1 blending value, both of which may be animated. Typically you'll animate the blending value to create soft transitions between solved distances and your animated ones.
This phase can be used for low-perspective object tracks where the object jitters substantially in depth. Though you might filter it, this phase lets you specifically animate it (like the animated distance constraint during solving, but this makes it happen).
You can use the Key from scene or Key from incoming buttons to pull the current distance between the object and camera and write it as a distance key as you're starting to animate transitions.
Alternatively you can turn on Treat as scale and animate relative changes to the distance, ie where 1 means keep the same distance, 0.5 is half that, etc. This is the default mode since it is generically nondestructive.
You can use this phase to operate on either solve (usual) or seed paths. The graph editor shows the Camera/Object Lock Distance value as the Distance curve under Seed Path, instead of actual seed-path distance, which can be a little surprising if you're using the graph editor for reference while animating the distance.
Note that changing the distance does not affect tracker coordinates.
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