You'll use footsteps 4 and 5 as the footsteps where the biped pauses.
5 In the Biped rollout, turn on Footstep Mode.
6 In the Perspective viewport, select footsteps 5–7, then right-click and
choose Move.
7 Move the footsteps so that footstep 5 is next to footstep 4.
Making a Biped Stop and Start Walking | 749