These parameters let you test out the Velocity Threshold by doing a test run. This creates little icons that represent the stepping positions, allowing you to tune the correct Velocity Threshold.
To display: Select a biped guide whose elements have been tagged using the Create Character Biped Tags command, and choose Create Character Biped - Define Step Marks from the Animate toolbar.
For more information, see Converting a Biped's Motion to Deformable Tracks [ Character Animation ].